./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.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 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:14:25,001 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:14:25,072 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:14:25,075 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:14:25,076 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:14:25,109 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:14:25,109 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:14:25,110 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:14:25,110 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:14:25,111 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:14:25,113 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:14:25,113 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:14:25,113 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:14:25,114 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:14:25,115 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:14:25,116 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:14:25,116 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:14:25,116 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:14:25,117 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:14:25,117 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:14:25,117 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:14:25,120 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:14:25,120 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:14:25,120 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:14:25,121 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:14:25,121 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:14:25,121 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:14:25,121 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:14:25,122 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:14:25,122 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:14:25,122 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:14:25,122 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:14:25,122 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:14:25,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:14:25,123 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:14:25,123 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:14:25,124 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:14:25,124 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:14:25,125 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:14:25,125 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:14:25,125 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:14:25,126 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:14:25,126 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2024-10-24 19:14:25,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:14:25,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:14:25,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:14:25,373 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:14:25,373 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:14:25,374 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-10-24 19:14:26,733 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:14:26,910 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:14:26,911 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-10-24 19:14:26,919 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f62bd7b7d/7862c00c31d54af1a2b973ee19c027d3/FLAG3bfb3e463 [2024-10-24 19:14:26,932 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f62bd7b7d/7862c00c31d54af1a2b973ee19c027d3 [2024-10-24 19:14:26,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:14:26,936 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:14:26,938 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:14:26,938 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:14:26,942 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:14:26,942 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:14:26" (1/1) ... [2024-10-24 19:14:26,943 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b91ad2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:14:26, skipping insertion in model container [2024-10-24 19:14:26,943 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:14:26" (1/1) ... [2024-10-24 19:14:26,963 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:14:27,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:14:27,152 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-10-24 19:14:27,152 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@53b69a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:14:27, skipping insertion in model container [2024-10-24 19:14:27,152 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:14:27,153 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-24 19:14:27,154 INFO L158 Benchmark]: Toolchain (without parser) took 217.96ms. Allocated memory is still 165.7MB. Free memory was 116.2MB in the beginning and 104.3MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-24 19:14:27,155 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 165.7MB. Free memory is still 133.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 19:14:27,155 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.77ms. Allocated memory is still 165.7MB. Free memory was 116.1MB in the beginning and 104.3MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-24 19:14:27,156 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 165.7MB. Free memory is still 133.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 214.77ms. Allocated memory is still 165.7MB. Free memory was 116.1MB in the beginning and 104.3MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/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-array-int-symm.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 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:14:29,085 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:14:29,170 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-24 19:14:29,174 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:14:29,175 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:14:29,205 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:14:29,206 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:14:29,206 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:14:29,207 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:14:29,209 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:14:29,209 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:14:29,209 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:14:29,210 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:14:29,210 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:14:29,210 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:14:29,211 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:14:29,211 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:14:29,211 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:14:29,212 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:14:29,212 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:14:29,214 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:14:29,215 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:14:29,215 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:14:29,216 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:14:29,216 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:14:29,216 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-24 19:14:29,216 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:14:29,217 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-24 19:14:29,217 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:14:29,217 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:14:29,218 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:14:29,218 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:14:29,218 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:14:29,219 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:14:29,219 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:14:29,219 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:14:29,219 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:14:29,220 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:14:29,220 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-24 19:14:29,220 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-24 19:14:29,220 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:14:29,222 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:14:29,222 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:14:29,222 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:14:29,223 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-24 19:14:29,223 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2024-10-24 19:14:29,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:14:29,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:14:29,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:14:29,545 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:14:29,545 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:14:29,547 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-10-24 19:14:31,093 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:14:31,316 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:14:31,318 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-10-24 19:14:31,327 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7c827ffa/ec0e59bc7d0e448285fffd940ae02424/FLAGc5dccfe65 [2024-10-24 19:14:31,340 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7c827ffa/ec0e59bc7d0e448285fffd940ae02424 [2024-10-24 19:14:31,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:14:31,343 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:14:31,344 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:14:31,345 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:14:31,349 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:14:31,350 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:14:31" (1/1) ... [2024-10-24 19:14:31,351 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21fe1194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:14:31, skipping insertion in model container [2024-10-24 19:14:31,351 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:14:31" (1/1) ... [2024-10-24 19:14:31,372 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:14:31,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:14:31,608 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-24 19:14:31,612 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:14:31,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:14:31,648 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:14:31,683 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:14:31,708 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:14:31,708 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:14:31 WrapperNode [2024-10-24 19:14:31,708 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:14:31,709 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:14:31,710 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:14:31,710 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:14:31,716 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:14:31" (1/1) ... [2024-10-24 19:14:31,728 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:14:31" (1/1) ... [2024-10-24 19:14:31,760 INFO L138 Inliner]: procedures = 26, calls = 30, calls flagged for inlining = 14, calls inlined = 18, statements flattened = 189 [2024-10-24 19:14:31,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:14:31,765 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:14:31,765 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:14:31,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:14:31,778 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:14:31" (1/1) ... [2024-10-24 19:14:31,779 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:14:31" (1/1) ... [2024-10-24 19:14:31,788 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:14:31" (1/1) ... [2024-10-24 19:14:31,822 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-24 19:14:31,823 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:14:31" (1/1) ... [2024-10-24 19:14:31,823 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:14:31" (1/1) ... [2024-10-24 19:14:31,838 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:14:31" (1/1) ... [2024-10-24 19:14:31,846 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:14:31" (1/1) ... [2024-10-24 19:14:31,847 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:14:31" (1/1) ... [2024-10-24 19:14:31,853 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:14:31" (1/1) ... [2024-10-24 19:14:31,856 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:14:31,859 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:14:31,859 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:14:31,859 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:14:31,861 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:14:31" (1/1) ... [2024-10-24 19:14:31,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:14:31,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:14:31,892 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 19:14:31,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 19:14:31,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:14:31,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-24 19:14:31,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-24 19:14:31,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-24 19:14:31,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-24 19:14:31,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 19:14:31,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 19:14:31,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 19:14:31,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 19:14:31,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 19:14:31,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:14:31,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:14:31,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-24 19:14:31,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-24 19:14:31,948 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 19:14:32,089 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:14:32,092 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:14:32,625 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:14:32,625 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:14:32,885 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:14:32,886 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-24 19:14:32,886 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:14:32 BoogieIcfgContainer [2024-10-24 19:14:32,887 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:14:32,888 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:14:32,889 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:14:32,892 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:14:32,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:14:31" (1/3) ... [2024-10-24 19:14:32,893 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc2371a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:14:32, skipping insertion in model container [2024-10-24 19:14:32,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:14:31" (2/3) ... [2024-10-24 19:14:32,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc2371a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:14:32, skipping insertion in model container [2024-10-24 19:14:32,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:14:32" (3/3) ... [2024-10-24 19:14:32,896 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2024-10-24 19:14:32,911 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:14:32,911 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-10-24 19:14:32,911 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:14:32,967 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 19:14:32,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 60 transitions, 134 flow [2024-10-24 19:14:33,044 INFO L124 PetriNetUnfolderBase]: 6/58 cut-off events. [2024-10-24 19:14:33,044 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 19:14:33,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 58 events. 6/58 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 162 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2024-10-24 19:14:33,049 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 60 transitions, 134 flow [2024-10-24 19:14:33,053 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 57 transitions, 126 flow [2024-10-24 19:14:33,064 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:14:33,072 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;@15d58d39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:14:33,073 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-10-24 19:14:33,076 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:14:33,076 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-24 19:14:33,076 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:14:33,077 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:14:33,077 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:14:33,078 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:14:33,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:14:33,082 INFO L85 PathProgramCache]: Analyzing trace with hash 631374, now seen corresponding path program 1 times [2024-10-24 19:14:33,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:14:33,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996302904] [2024-10-24 19:14:33,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:14:33,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:33,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:14:33,097 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:14:33,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-24 19:14:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:14:33,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 19:14:33,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:14:33,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-24 19:14:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:14:33,266 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:14:33,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:14:33,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996302904] [2024-10-24 19:14:33,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996302904] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:14:33,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:14:33,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:14:33,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138508136] [2024-10-24 19:14:33,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:14:33,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:14:33,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:14:33,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:14:33,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:14:33,380 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-10-24 19:14:33,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:33,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:14:33,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-10-24 19:14:33,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:14:33,551 INFO L124 PetriNetUnfolderBase]: 116/323 cut-off events. [2024-10-24 19:14:33,552 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-24 19:14:33,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 323 events. 116/323 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1678 event pairs, 68 based on Foata normal form. 1/215 useless extension candidates. Maximal degree in co-relation 476. Up to 183 conditions per place. [2024-10-24 19:14:33,560 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 24 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2024-10-24 19:14:33,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 53 transitions, 170 flow [2024-10-24 19:14:33,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:14:33,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:14:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2024-10-24 19:14:33,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-10-24 19:14:33,577 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 126 flow. Second operand 3 states and 119 transitions. [2024-10-24 19:14:33,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 53 transitions, 170 flow [2024-10-24 19:14:33,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 162 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:14:33,582 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 114 flow [2024-10-24 19:14:33,584 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2024-10-24 19:14:33,587 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -6 predicate places. [2024-10-24 19:14:33,589 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 114 flow [2024-10-24 19:14:33,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:33,589 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:14:33,589 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:14:33,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-10-24 19:14:33,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:33,791 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:14:33,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:14:33,791 INFO L85 PathProgramCache]: Analyzing trace with hash 631375, now seen corresponding path program 1 times [2024-10-24 19:14:33,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:14:33,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678587039] [2024-10-24 19:14:33,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:14:33,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:33,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:14:33,795 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:14:33,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-24 19:14:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:14:33,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:14:33,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:14:33,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:14:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:14:33,976 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:14:33,977 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:14:33,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678587039] [2024-10-24 19:14:33,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678587039] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:14:33,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:14:33,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:14:33,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880673304] [2024-10-24 19:14:33,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:14:33,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:14:33,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:14:33,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:14:33,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:14:34,234 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-10-24 19:14:34,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:34,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:14:34,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-10-24 19:14:34,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:14:34,473 INFO L124 PetriNetUnfolderBase]: 118/329 cut-off events. [2024-10-24 19:14:34,473 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-24 19:14:34,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537 conditions, 329 events. 118/329 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1699 event pairs, 68 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 501. Up to 192 conditions per place. [2024-10-24 19:14:34,478 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 27 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-10-24 19:14:34,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 196 flow [2024-10-24 19:14:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:14:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:14:34,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 156 transitions. [2024-10-24 19:14:34,482 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-10-24 19:14:34,483 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 114 flow. Second operand 4 states and 156 transitions. [2024-10-24 19:14:34,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 196 flow [2024-10-24 19:14:34,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:14:34,486 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 166 flow [2024-10-24 19:14:34,487 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2024-10-24 19:14:34,488 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -2 predicate places. [2024-10-24 19:14:34,488 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 166 flow [2024-10-24 19:14:34,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:34,489 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:14:34,489 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-24 19:14:34,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-10-24 19:14:34,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:34,694 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:14:34,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:14:34,695 INFO L85 PathProgramCache]: Analyzing trace with hash 606771554, now seen corresponding path program 1 times [2024-10-24 19:14:34,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:14:34,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019872749] [2024-10-24 19:14:34,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:14:34,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:34,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:14:34,697 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:14:34,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-24 19:14:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:14:34,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 19:14:34,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:14:34,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:14:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:14:34,917 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:14:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:14:35,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:14:35,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019872749] [2024-10-24 19:14:35,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019872749] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:14:35,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:14:35,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-24 19:14:35,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842409534] [2024-10-24 19:14:35,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:14:35,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:14:35,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:14:35,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:14:35,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:14:36,020 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-10-24 19:14:36,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 166 flow. Second operand has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:36,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:14:36,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-10-24 19:14:36,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:14:36,952 INFO L124 PetriNetUnfolderBase]: 124/347 cut-off events. [2024-10-24 19:14:36,952 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-24 19:14:36,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 347 events. 124/347 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1816 event pairs, 68 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 512. Up to 195 conditions per place. [2024-10-24 19:14:36,959 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 27 selfloop transitions, 25 changer transitions 0/77 dead transitions. [2024-10-24 19:14:36,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 348 flow [2024-10-24 19:14:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 19:14:36,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 19:14:36,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 358 transitions. [2024-10-24 19:14:36,963 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5966666666666667 [2024-10-24 19:14:36,963 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 166 flow. Second operand 10 states and 358 transitions. [2024-10-24 19:14:36,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 348 flow [2024-10-24 19:14:36,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 348 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:14:36,970 INFO L231 Difference]: Finished difference. Result has 68 places, 77 transitions, 328 flow [2024-10-24 19:14:36,972 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=328, PETRI_PLACES=68, PETRI_TRANSITIONS=77} [2024-10-24 19:14:36,973 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 10 predicate places. [2024-10-24 19:14:36,973 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 77 transitions, 328 flow [2024-10-24 19:14:36,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:36,974 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:14:36,974 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:14:36,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-10-24 19:14:37,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:37,175 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:14:37,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:14:37,176 INFO L85 PathProgramCache]: Analyzing trace with hash -974384368, now seen corresponding path program 1 times [2024-10-24 19:14:37,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:14:37,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654755795] [2024-10-24 19:14:37,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:14:37,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:37,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:14:37,182 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:14:37,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-24 19:14:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:14:37,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:14:37,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:14:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:14:37,297 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:14:37,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:14:37,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654755795] [2024-10-24 19:14:37,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654755795] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:14:37,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:14:37,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:14:37,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972445772] [2024-10-24 19:14:37,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:14:37,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:14:37,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:14:37,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:14:37,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:14:37,370 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-24 19:14:37,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 77 transitions, 328 flow. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:37,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:14:37,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-24 19:14:37,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:14:37,583 INFO L124 PetriNetUnfolderBase]: 218/579 cut-off events. [2024-10-24 19:14:37,583 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2024-10-24 19:14:37,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1109 conditions, 579 events. 218/579 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3371 event pairs, 87 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 1021. Up to 241 conditions per place. [2024-10-24 19:14:37,588 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 87 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2024-10-24 19:14:37,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 117 transitions, 667 flow [2024-10-24 19:14:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:14:37,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:14:37,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 214 transitions. [2024-10-24 19:14:37,591 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7133333333333334 [2024-10-24 19:14:37,591 INFO L175 Difference]: Start difference. First operand has 68 places, 77 transitions, 328 flow. Second operand 5 states and 214 transitions. [2024-10-24 19:14:37,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 117 transitions, 667 flow [2024-10-24 19:14:37,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 117 transitions, 573 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-10-24 19:14:37,596 INFO L231 Difference]: Finished difference. Result has 70 places, 78 transitions, 281 flow [2024-10-24 19:14:37,597 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=281, PETRI_PLACES=70, PETRI_TRANSITIONS=78} [2024-10-24 19:14:37,597 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2024-10-24 19:14:37,597 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 78 transitions, 281 flow [2024-10-24 19:14:37,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:37,598 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:14:37,598 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:14:37,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-24 19:14:37,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:37,801 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:14:37,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:14:37,802 INFO L85 PathProgramCache]: Analyzing trace with hash -87652238, now seen corresponding path program 1 times [2024-10-24 19:14:37,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:14:37,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416281994] [2024-10-24 19:14:37,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:14:37,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:37,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:14:37,804 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:14:37,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-24 19:14:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:14:37,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:14:37,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:14:37,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:14:37,932 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:14:37,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:14:37,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416281994] [2024-10-24 19:14:37,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416281994] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:14:37,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:14:37,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:14:37,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13823476] [2024-10-24 19:14:37,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:14:37,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:14:37,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:14:37,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:14:37,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:14:38,007 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-24 19:14:38,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 78 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:38,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:14:38,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-24 19:14:38,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:14:38,216 INFO L124 PetriNetUnfolderBase]: 188/483 cut-off events. [2024-10-24 19:14:38,216 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-10-24 19:14:38,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 483 events. 188/483 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2567 event pairs, 91 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 888. Up to 239 conditions per place. [2024-10-24 19:14:38,219 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 80 selfloop transitions, 4 changer transitions 0/110 dead transitions. [2024-10-24 19:14:38,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 110 transitions, 564 flow [2024-10-24 19:14:38,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:14:38,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:14:38,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 207 transitions. [2024-10-24 19:14:38,221 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.69 [2024-10-24 19:14:38,221 INFO L175 Difference]: Start difference. First operand has 70 places, 78 transitions, 281 flow. Second operand 5 states and 207 transitions. [2024-10-24 19:14:38,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 110 transitions, 564 flow [2024-10-24 19:14:38,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 110 transitions, 560 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 19:14:38,228 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 294 flow [2024-10-24 19:14:38,228 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-10-24 19:14:38,229 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 17 predicate places. [2024-10-24 19:14:38,229 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 294 flow [2024-10-24 19:14:38,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:38,229 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:14:38,229 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:14:38,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-10-24 19:14:38,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:38,430 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:14:38,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:14:38,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1942309027, now seen corresponding path program 1 times [2024-10-24 19:14:38,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:14:38,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542630225] [2024-10-24 19:14:38,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:14:38,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:38,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:14:38,433 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:14:38,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-24 19:14:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:14:38,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:14:38,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:14:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:14:38,561 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:14:38,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:14:38,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542630225] [2024-10-24 19:14:38,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542630225] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:14:38,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:14:38,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 19:14:38,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452757259] [2024-10-24 19:14:38,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:14:38,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:14:38,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:14:38,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:14:38,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:14:38,616 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-24 19:14:38,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:38,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:14:38,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-24 19:14:38,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:14:38,847 INFO L124 PetriNetUnfolderBase]: 300/779 cut-off events. [2024-10-24 19:14:38,848 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-10-24 19:14:38,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 779 events. 300/779 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4703 event pairs, 132 based on Foata normal form. 12/616 useless extension candidates. Maximal degree in co-relation 1524. Up to 338 conditions per place. [2024-10-24 19:14:38,853 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 72 selfloop transitions, 9 changer transitions 0/107 dead transitions. [2024-10-24 19:14:38,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 107 transitions, 535 flow [2024-10-24 19:14:38,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:14:38,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:14:38,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 211 transitions. [2024-10-24 19:14:38,854 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7033333333333334 [2024-10-24 19:14:38,854 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 294 flow. Second operand 5 states and 211 transitions. [2024-10-24 19:14:38,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 107 transitions, 535 flow [2024-10-24 19:14:38,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 107 transitions, 522 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:14:38,859 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 320 flow [2024-10-24 19:14:38,859 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-10-24 19:14:38,859 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2024-10-24 19:14:38,860 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 320 flow [2024-10-24 19:14:38,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:38,860 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:14:38,860 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:14:38,864 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 [2024-10-24 19:14:39,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:39,061 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:14:39,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:14:39,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1758943930, now seen corresponding path program 1 times [2024-10-24 19:14:39,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:14:39,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693827295] [2024-10-24 19:14:39,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:14:39,062 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:39,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:14:39,064 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:14:39,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-24 19:14:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:14:39,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:14:39,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:14:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:14:39,203 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:14:39,203 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:14:39,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693827295] [2024-10-24 19:14:39,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693827295] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:14:39,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:14:39,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 19:14:39,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150727375] [2024-10-24 19:14:39,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:14:39,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:14:39,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:14:39,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:14:39,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:14:39,252 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-24 19:14:39,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:39,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:14:39,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-24 19:14:39,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:14:39,489 INFO L124 PetriNetUnfolderBase]: 270/685 cut-off events. [2024-10-24 19:14:39,490 INFO L125 PetriNetUnfolderBase]: For 353/353 co-relation queries the response was YES. [2024-10-24 19:14:39,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1527 conditions, 685 events. 270/685 cut-off events. For 353/353 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3815 event pairs, 142 based on Foata normal form. 9/557 useless extension candidates. Maximal degree in co-relation 1446. Up to 336 conditions per place. [2024-10-24 19:14:39,496 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 65 selfloop transitions, 9 changer transitions 0/100 dead transitions. [2024-10-24 19:14:39,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 100 transitions, 531 flow [2024-10-24 19:14:39,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:14:39,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:14:39,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 204 transitions. [2024-10-24 19:14:39,498 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-10-24 19:14:39,498 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 320 flow. Second operand 5 states and 204 transitions. [2024-10-24 19:14:39,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 100 transitions, 531 flow [2024-10-24 19:14:39,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 100 transitions, 525 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:14:39,503 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 353 flow [2024-10-24 19:14:39,504 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=353, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2024-10-24 19:14:39,504 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 25 predicate places. [2024-10-24 19:14:39,505 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 353 flow [2024-10-24 19:14:39,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:39,506 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:14:39,506 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:14:39,511 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 [2024-10-24 19:14:39,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:39,707 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:14:39,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:14:39,708 INFO L85 PathProgramCache]: Analyzing trace with hash -219840755, now seen corresponding path program 1 times [2024-10-24 19:14:39,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:14:39,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398997973] [2024-10-24 19:14:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:14:39,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:39,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:14:39,709 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:14:39,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-24 19:14:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:14:39,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 19:14:39,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:14:39,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-24 19:14:39,863 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-24 19:14:39,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-10-24 19:14:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:14:39,889 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:14:39,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:14:39,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398997973] [2024-10-24 19:14:39,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398997973] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:14:39,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:14:39,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:14:39,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603564206] [2024-10-24 19:14:39,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:14:39,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:14:39,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:14:39,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:14:39,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:14:39,972 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-10-24 19:14:39,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 353 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:39,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:14:39,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-10-24 19:14:39,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:14:40,148 INFO L124 PetriNetUnfolderBase]: 314/759 cut-off events. [2024-10-24 19:14:40,148 INFO L125 PetriNetUnfolderBase]: For 531/531 co-relation queries the response was YES. [2024-10-24 19:14:40,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1761 conditions, 759 events. 314/759 cut-off events. For 531/531 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4229 event pairs, 244 based on Foata normal form. 0/651 useless extension candidates. Maximal degree in co-relation 1677. Up to 556 conditions per place. [2024-10-24 19:14:40,152 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 48 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-10-24 19:14:40,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 79 transitions, 463 flow [2024-10-24 19:14:40,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:14:40,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:14:40,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-10-24 19:14:40,155 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-10-24 19:14:40,155 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 353 flow. Second operand 5 states and 148 transitions. [2024-10-24 19:14:40,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 79 transitions, 463 flow [2024-10-24 19:14:40,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 450 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:14:40,158 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 354 flow [2024-10-24 19:14:40,158 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=354, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-10-24 19:14:40,159 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 23 predicate places. [2024-10-24 19:14:40,159 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 354 flow [2024-10-24 19:14:40,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:40,159 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:14:40,159 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:14:40,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2024-10-24 19:14:40,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:40,363 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:14:40,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:14:40,364 INFO L85 PathProgramCache]: Analyzing trace with hash -219840754, now seen corresponding path program 1 times [2024-10-24 19:14:40,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:14:40,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281866011] [2024-10-24 19:14:40,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:14:40,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:40,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:14:40,366 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:14:40,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-24 19:14:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:14:40,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 19:14:40,468 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:14:40,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-24 19:14:40,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:14:40,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:14:40,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-24 19:14:40,622 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:14:40,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-24 19:14:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:14:40,778 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:14:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:14:41,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:14:41,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281866011] [2024-10-24 19:14:41,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281866011] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:14:41,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:14:41,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-24 19:14:41,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948298133] [2024-10-24 19:14:41,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:14:41,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:14:41,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:14:41,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:14:41,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-24 19:14:42,912 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-24 19:14:42,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 354 flow. Second operand has 12 states, 12 states have (on average 25.666666666666668) internal successors, (308), 12 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:42,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:14:42,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-24 19:14:42,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:14:45,115 INFO L124 PetriNetUnfolderBase]: 1000/2302 cut-off events. [2024-10-24 19:14:45,115 INFO L125 PetriNetUnfolderBase]: For 1053/1053 co-relation queries the response was YES. [2024-10-24 19:14:45,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4983 conditions, 2302 events. 1000/2302 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16331 event pairs, 336 based on Foata normal form. 0/1853 useless extension candidates. Maximal degree in co-relation 3609. Up to 450 conditions per place. [2024-10-24 19:14:45,129 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 147 selfloop transitions, 56 changer transitions 0/220 dead transitions. [2024-10-24 19:14:45,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 220 transitions, 1258 flow [2024-10-24 19:14:45,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-24 19:14:45,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-24 19:14:45,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 745 transitions. [2024-10-24 19:14:45,134 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5398550724637681 [2024-10-24 19:14:45,134 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 354 flow. Second operand 23 states and 745 transitions. [2024-10-24 19:14:45,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 220 transitions, 1258 flow [2024-10-24 19:14:45,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 220 transitions, 1231 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:14:45,144 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 630 flow [2024-10-24 19:14:45,144 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=630, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-10-24 19:14:45,145 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 43 predicate places. [2024-10-24 19:14:45,146 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 630 flow [2024-10-24 19:14:45,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 25.666666666666668) internal successors, (308), 12 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:45,146 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:14:45,147 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-24 19:14:45,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-10-24 19:14:45,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:45,348 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:14:45,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:14:45,349 INFO L85 PathProgramCache]: Analyzing trace with hash 237333019, now seen corresponding path program 2 times [2024-10-24 19:14:45,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:14:45,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565305788] [2024-10-24 19:14:45,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:14:45,350 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:45,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:14:45,353 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:14:45,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-24 19:14:45,422 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:14:45,423 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:14:45,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 19:14:45,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:14:45,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:14:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:14:45,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:14:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:14:46,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:14:46,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565305788] [2024-10-24 19:14:46,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [565305788] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:14:46,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:14:46,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-24 19:14:46,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292807077] [2024-10-24 19:14:46,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:14:46,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:14:46,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:14:46,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:14:46,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:14:47,685 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-10-24 19:14:47,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 630 flow. Second operand has 14 states, 14 states have (on average 31.571428571428573) internal successors, (442), 14 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:47,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:14:47,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-10-24 19:14:47,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:14:51,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:14:57,241 INFO L124 PetriNetUnfolderBase]: 821/2103 cut-off events. [2024-10-24 19:14:57,242 INFO L125 PetriNetUnfolderBase]: For 1696/1698 co-relation queries the response was YES. [2024-10-24 19:14:57,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4998 conditions, 2103 events. 821/2103 cut-off events. For 1696/1698 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15533 event pairs, 595 based on Foata normal form. 30/1791 useless extension candidates. Maximal degree in co-relation 3878. Up to 1417 conditions per place. [2024-10-24 19:14:57,253 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 44 selfloop transitions, 103 changer transitions 0/171 dead transitions. [2024-10-24 19:14:57,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 171 transitions, 1332 flow [2024-10-24 19:14:57,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 19:14:57,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-24 19:14:57,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 760 transitions. [2024-10-24 19:14:57,256 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-10-24 19:14:57,256 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 630 flow. Second operand 22 states and 760 transitions. [2024-10-24 19:14:57,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 171 transitions, 1332 flow [2024-10-24 19:14:57,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 171 transitions, 1298 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-10-24 19:14:57,265 INFO L231 Difference]: Finished difference. Result has 126 places, 171 transitions, 1300 flow [2024-10-24 19:14:57,267 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1300, PETRI_PLACES=126, PETRI_TRANSITIONS=171} [2024-10-24 19:14:57,268 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 68 predicate places. [2024-10-24 19:14:57,269 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 171 transitions, 1300 flow [2024-10-24 19:14:57,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 31.571428571428573) internal successors, (442), 14 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:57,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:14:57,269 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:14:57,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-10-24 19:14:57,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:57,470 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:14:57,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:14:57,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1774871804, now seen corresponding path program 1 times [2024-10-24 19:14:57,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:14:57,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133384034] [2024-10-24 19:14:57,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:14:57,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:57,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:14:57,472 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:14:57,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-24 19:14:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:14:57,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 19:14:57,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:14:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:14:57,619 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:14:57,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2024-10-24 19:14:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:14:57,772 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:14:57,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133384034] [2024-10-24 19:14:57,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133384034] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:14:57,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:14:57,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-24 19:14:57,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086981641] [2024-10-24 19:14:57,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:14:57,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:14:57,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:14:57,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:14:57,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:14:58,656 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-10-24 19:14:58,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 171 transitions, 1300 flow. Second operand has 10 states, 10 states have (on average 30.7) internal successors, (307), 10 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:58,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:14:58,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-10-24 19:14:58,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:14:59,468 INFO L124 PetriNetUnfolderBase]: 1181/2671 cut-off events. [2024-10-24 19:14:59,468 INFO L125 PetriNetUnfolderBase]: For 1578/1578 co-relation queries the response was YES. [2024-10-24 19:14:59,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6487 conditions, 2671 events. 1181/2671 cut-off events. For 1578/1578 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 18638 event pairs, 380 based on Foata normal form. 0/2405 useless extension candidates. Maximal degree in co-relation 6267. Up to 678 conditions per place. [2024-10-24 19:14:59,484 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 142 selfloop transitions, 49 changer transitions 0/214 dead transitions. [2024-10-24 19:14:59,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 214 transitions, 1797 flow [2024-10-24 19:14:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 19:14:59,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 19:14:59,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 319 transitions. [2024-10-24 19:14:59,486 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6645833333333333 [2024-10-24 19:14:59,486 INFO L175 Difference]: Start difference. First operand has 126 places, 171 transitions, 1300 flow. Second operand 8 states and 319 transitions. [2024-10-24 19:14:59,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 214 transitions, 1797 flow [2024-10-24 19:14:59,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 214 transitions, 1525 flow, removed 87 selfloop flow, removed 9 redundant places. [2024-10-24 19:14:59,499 INFO L231 Difference]: Finished difference. Result has 125 places, 173 transitions, 1173 flow [2024-10-24 19:14:59,502 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1173, PETRI_PLACES=125, PETRI_TRANSITIONS=173} [2024-10-24 19:14:59,502 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 67 predicate places. [2024-10-24 19:14:59,502 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 173 transitions, 1173 flow [2024-10-24 19:14:59,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.7) internal successors, (307), 10 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:59,503 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:14:59,503 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:14:59,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-10-24 19:14:59,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:59,707 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:14:59,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:14:59,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1774871803, now seen corresponding path program 1 times [2024-10-24 19:14:59,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:14:59,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307885516] [2024-10-24 19:14:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:14:59,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:14:59,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:14:59,711 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:14:59,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-24 19:14:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:14:59,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 19:14:59,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:14:59,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-24 19:14:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:14:59,802 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:14:59,802 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:14:59,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307885516] [2024-10-24 19:14:59,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307885516] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:14:59,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:14:59,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:14:59,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593363803] [2024-10-24 19:14:59,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:14:59,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:14:59,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:14:59,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:14:59,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:14:59,871 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-10-24 19:14:59,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 173 transitions, 1173 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:59,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:14:59,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-10-24 19:14:59,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:15:00,270 INFO L124 PetriNetUnfolderBase]: 1398/3040 cut-off events. [2024-10-24 19:15:00,270 INFO L125 PetriNetUnfolderBase]: For 2578/2578 co-relation queries the response was YES. [2024-10-24 19:15:00,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7661 conditions, 3040 events. 1398/3040 cut-off events. For 2578/2578 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 20925 event pairs, 1086 based on Foata normal form. 82/2976 useless extension candidates. Maximal degree in co-relation 7464. Up to 2370 conditions per place. [2024-10-24 19:15:00,294 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 131 selfloop transitions, 20 changer transitions 0/169 dead transitions. [2024-10-24 19:15:00,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 169 transitions, 1467 flow [2024-10-24 19:15:00,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:15:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:15:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-10-24 19:15:00,297 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-10-24 19:15:00,297 INFO L175 Difference]: Start difference. First operand has 125 places, 173 transitions, 1173 flow. Second operand 4 states and 125 transitions. [2024-10-24 19:15:00,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 169 transitions, 1467 flow [2024-10-24 19:15:00,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 169 transitions, 1418 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-24 19:15:00,309 INFO L231 Difference]: Finished difference. Result has 120 places, 169 transitions, 1156 flow [2024-10-24 19:15:00,310 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1156, PETRI_PLACES=120, PETRI_TRANSITIONS=169} [2024-10-24 19:15:00,311 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 62 predicate places. [2024-10-24 19:15:00,311 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 169 transitions, 1156 flow [2024-10-24 19:15:00,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:00,313 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:15:00,313 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:15:00,317 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 [2024-10-24 19:15:00,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:00,513 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:15:00,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:15:00,514 INFO L85 PathProgramCache]: Analyzing trace with hash -820713168, now seen corresponding path program 1 times [2024-10-24 19:15:00,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:15:00,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053760462] [2024-10-24 19:15:00,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:15:00,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:00,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:15:00,515 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:15:00,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-24 19:15:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:15:00,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 19:15:00,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:15:00,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-24 19:15:00,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:15:00,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:15:00,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-24 19:15:00,800 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:15:00,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-24 19:15:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:15:00,950 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:15:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:15:01,298 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:15:01,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053760462] [2024-10-24 19:15:01,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053760462] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:15:01,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:15:01,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-24 19:15:01,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682639470] [2024-10-24 19:15:01,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:15:01,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:15:01,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:15:01,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:15:01,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-24 19:15:02,952 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-10-24 19:15:02,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 169 transitions, 1156 flow. Second operand has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:02,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:15:02,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-10-24 19:15:02,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:15:05,209 INFO L124 PetriNetUnfolderBase]: 1684/3709 cut-off events. [2024-10-24 19:15:05,209 INFO L125 PetriNetUnfolderBase]: For 2993/3075 co-relation queries the response was YES. [2024-10-24 19:15:05,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8855 conditions, 3709 events. 1684/3709 cut-off events. For 2993/3075 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 27445 event pairs, 676 based on Foata normal form. 0/3264 useless extension candidates. Maximal degree in co-relation 8651. Up to 737 conditions per place. [2024-10-24 19:15:05,229 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 160 selfloop transitions, 110 changer transitions 0/287 dead transitions. [2024-10-24 19:15:05,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 287 transitions, 2227 flow [2024-10-24 19:15:05,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-24 19:15:05,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-24 19:15:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 756 transitions. [2024-10-24 19:15:05,234 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5478260869565217 [2024-10-24 19:15:05,234 INFO L175 Difference]: Start difference. First operand has 120 places, 169 transitions, 1156 flow. Second operand 23 states and 756 transitions. [2024-10-24 19:15:05,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 287 transitions, 2227 flow [2024-10-24 19:15:05,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 287 transitions, 2192 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:15:05,255 INFO L231 Difference]: Finished difference. Result has 141 places, 179 transitions, 1414 flow [2024-10-24 19:15:05,255 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1414, PETRI_PLACES=141, PETRI_TRANSITIONS=179} [2024-10-24 19:15:05,256 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 83 predicate places. [2024-10-24 19:15:05,256 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 179 transitions, 1414 flow [2024-10-24 19:15:05,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:05,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:15:05,256 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:15:05,262 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 [2024-10-24 19:15:05,456 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 [2024-10-24 19:15:05,457 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:15:05,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:15:05,457 INFO L85 PathProgramCache]: Analyzing trace with hash 327696172, now seen corresponding path program 1 times [2024-10-24 19:15:05,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:15:05,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317803082] [2024-10-24 19:15:05,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:15:05,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:05,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:15:05,461 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) [2024-10-24 19:15:05,463 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 [2024-10-24 19:15:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:15:05,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 19:15:05,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:15:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:15:05,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:15:05,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2024-10-24 19:15:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:15:05,788 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:15:05,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317803082] [2024-10-24 19:15:05,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317803082] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:15:05,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:15:05,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-24 19:15:05,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776187626] [2024-10-24 19:15:05,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:15:05,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:15:05,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:15:05,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:15:05,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:15:06,435 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-10-24 19:15:06,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 179 transitions, 1414 flow. Second operand has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:06,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:15:06,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-10-24 19:15:06,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:15:07,324 INFO L124 PetriNetUnfolderBase]: 2375/4771 cut-off events. [2024-10-24 19:15:07,325 INFO L125 PetriNetUnfolderBase]: For 4578/4712 co-relation queries the response was YES. [2024-10-24 19:15:07,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12300 conditions, 4771 events. 2375/4771 cut-off events. For 4578/4712 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 34144 event pairs, 709 based on Foata normal form. 0/4651 useless extension candidates. Maximal degree in co-relation 12078. Up to 1480 conditions per place. [2024-10-24 19:15:07,351 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 163 selfloop transitions, 49 changer transitions 0/233 dead transitions. [2024-10-24 19:15:07,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 233 transitions, 2083 flow [2024-10-24 19:15:07,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 19:15:07,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 19:15:07,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 309 transitions. [2024-10-24 19:15:07,354 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-10-24 19:15:07,354 INFO L175 Difference]: Start difference. First operand has 141 places, 179 transitions, 1414 flow. Second operand 8 states and 309 transitions. [2024-10-24 19:15:07,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 233 transitions, 2083 flow [2024-10-24 19:15:07,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 233 transitions, 1957 flow, removed 4 selfloop flow, removed 15 redundant places. [2024-10-24 19:15:07,375 INFO L231 Difference]: Finished difference. Result has 134 places, 181 transitions, 1433 flow [2024-10-24 19:15:07,375 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1433, PETRI_PLACES=134, PETRI_TRANSITIONS=181} [2024-10-24 19:15:07,376 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 76 predicate places. [2024-10-24 19:15:07,377 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 181 transitions, 1433 flow [2024-10-24 19:15:07,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:07,377 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:15:07,377 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:15:07,382 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 [2024-10-24 19:15:07,580 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 [2024-10-24 19:15:07,581 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:15:07,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:15:07,581 INFO L85 PathProgramCache]: Analyzing trace with hash -135882540, now seen corresponding path program 1 times [2024-10-24 19:15:07,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:15:07,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271081096] [2024-10-24 19:15:07,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:15:07,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:07,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:15:07,585 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) [2024-10-24 19:15:07,587 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 [2024-10-24 19:15:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:15:07,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 19:15:07,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:15:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:15:07,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:15:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:15:07,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:15:07,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271081096] [2024-10-24 19:15:07,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271081096] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:15:07,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:15:07,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-24 19:15:07,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157103257] [2024-10-24 19:15:07,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:15:07,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:15:07,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:15:07,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:15:07,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:15:08,317 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-24 19:15:08,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 181 transitions, 1433 flow. Second operand has 14 states, 14 states have (on average 32.714285714285715) internal successors, (458), 14 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:08,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:15:08,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-24 19:15:08,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:15:09,034 INFO L124 PetriNetUnfolderBase]: 1826/4126 cut-off events. [2024-10-24 19:15:09,034 INFO L125 PetriNetUnfolderBase]: For 5171/5259 co-relation queries the response was YES. [2024-10-24 19:15:09,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11183 conditions, 4126 events. 1826/4126 cut-off events. For 5171/5259 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 30860 event pairs, 1145 based on Foata normal form. 24/4080 useless extension candidates. Maximal degree in co-relation 10964. Up to 2317 conditions per place. [2024-10-24 19:15:09,057 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 189 selfloop transitions, 70 changer transitions 0/282 dead transitions. [2024-10-24 19:15:09,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 282 transitions, 2551 flow [2024-10-24 19:15:09,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 19:15:09,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-24 19:15:09,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 443 transitions. [2024-10-24 19:15:09,060 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6712121212121213 [2024-10-24 19:15:09,060 INFO L175 Difference]: Start difference. First operand has 134 places, 181 transitions, 1433 flow. Second operand 11 states and 443 transitions. [2024-10-24 19:15:09,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 282 transitions, 2551 flow [2024-10-24 19:15:09,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 282 transitions, 2444 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-10-24 19:15:09,112 INFO L231 Difference]: Finished difference. Result has 141 places, 201 transitions, 1816 flow [2024-10-24 19:15:09,112 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1816, PETRI_PLACES=141, PETRI_TRANSITIONS=201} [2024-10-24 19:15:09,113 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 83 predicate places. [2024-10-24 19:15:09,113 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 201 transitions, 1816 flow [2024-10-24 19:15:09,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 32.714285714285715) internal successors, (458), 14 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:09,114 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:15:09,114 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:15:09,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2024-10-24 19:15:09,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:09,314 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:15:09,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:15:09,315 INFO L85 PathProgramCache]: Analyzing trace with hash -63400330, now seen corresponding path program 1 times [2024-10-24 19:15:09,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:15:09,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51697740] [2024-10-24 19:15:09,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:15:09,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:09,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:15:09,319 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:15:09,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-10-24 19:15:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:15:09,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 19:15:09,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:15:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:15:09,529 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:15:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:15:09,636 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:15:09,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51697740] [2024-10-24 19:15:09,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51697740] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:15:09,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:15:09,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-24 19:15:09,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259586919] [2024-10-24 19:15:09,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:15:09,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:15:09,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:15:09,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:15:09,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:15:09,945 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-24 19:15:09,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 201 transitions, 1816 flow. Second operand has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:09,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:15:09,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-24 19:15:09,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:15:10,731 INFO L124 PetriNetUnfolderBase]: 1725/3757 cut-off events. [2024-10-24 19:15:10,732 INFO L125 PetriNetUnfolderBase]: For 4647/4739 co-relation queries the response was YES. [2024-10-24 19:15:10,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10343 conditions, 3757 events. 1725/3757 cut-off events. For 4647/4739 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 26795 event pairs, 1180 based on Foata normal form. 18/3696 useless extension candidates. Maximal degree in co-relation 10096. Up to 2329 conditions per place. [2024-10-24 19:15:10,750 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 182 selfloop transitions, 70 changer transitions 0/274 dead transitions. [2024-10-24 19:15:10,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 274 transitions, 2725 flow [2024-10-24 19:15:10,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 19:15:10,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-24 19:15:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 439 transitions. [2024-10-24 19:15:10,752 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6651515151515152 [2024-10-24 19:15:10,752 INFO L175 Difference]: Start difference. First operand has 141 places, 201 transitions, 1816 flow. Second operand 11 states and 439 transitions. [2024-10-24 19:15:10,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 274 transitions, 2725 flow [2024-10-24 19:15:10,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 274 transitions, 2709 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:15:10,769 INFO L231 Difference]: Finished difference. Result has 148 places, 199 transitions, 1939 flow [2024-10-24 19:15:10,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1939, PETRI_PLACES=148, PETRI_TRANSITIONS=199} [2024-10-24 19:15:10,771 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 90 predicate places. [2024-10-24 19:15:10,771 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 199 transitions, 1939 flow [2024-10-24 19:15:10,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:10,772 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:15:10,772 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:15:10,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2024-10-24 19:15:10,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:10,972 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:15:10,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:15:10,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1414938719, now seen corresponding path program 1 times [2024-10-24 19:15:10,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:15:10,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1714569778] [2024-10-24 19:15:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:15:10,973 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:10,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:15:10,975 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:15:10,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-10-24 19:15:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:15:11,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 19:15:11,034 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:15:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:15:11,248 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:15:11,248 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:15:11,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1714569778] [2024-10-24 19:15:11,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1714569778] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:15:11,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:15:11,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 19:15:11,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762998673] [2024-10-24 19:15:11,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:15:11,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 19:15:11,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:15:11,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 19:15:11,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-24 19:15:11,330 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2024-10-24 19:15:11,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 199 transitions, 1939 flow. Second operand has 7 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:11,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:15:11,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2024-10-24 19:15:11,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:15:12,021 INFO L124 PetriNetUnfolderBase]: 1537/3597 cut-off events. [2024-10-24 19:15:12,022 INFO L125 PetriNetUnfolderBase]: For 4809/4891 co-relation queries the response was YES. [2024-10-24 19:15:12,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10036 conditions, 3597 events. 1537/3597 cut-off events. For 4809/4891 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 26690 event pairs, 722 based on Foata normal form. 1/3546 useless extension candidates. Maximal degree in co-relation 9775. Up to 2535 conditions per place. [2024-10-24 19:15:12,040 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 173 selfloop transitions, 18 changer transitions 13/227 dead transitions. [2024-10-24 19:15:12,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 227 transitions, 2524 flow [2024-10-24 19:15:12,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:15:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:15:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 242 transitions. [2024-10-24 19:15:12,042 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6722222222222223 [2024-10-24 19:15:12,042 INFO L175 Difference]: Start difference. First operand has 148 places, 199 transitions, 1939 flow. Second operand 6 states and 242 transitions. [2024-10-24 19:15:12,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 227 transitions, 2524 flow [2024-10-24 19:15:12,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 227 transitions, 2387 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-24 19:15:12,062 INFO L231 Difference]: Finished difference. Result has 149 places, 211 transitions, 2003 flow [2024-10-24 19:15:12,062 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1805, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2003, PETRI_PLACES=149, PETRI_TRANSITIONS=211} [2024-10-24 19:15:12,063 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 91 predicate places. [2024-10-24 19:15:12,063 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 211 transitions, 2003 flow [2024-10-24 19:15:12,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:12,063 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:15:12,064 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:15:12,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2024-10-24 19:15:12,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:12,264 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:15:12,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:15:12,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1139089671, now seen corresponding path program 2 times [2024-10-24 19:15:12,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:15:12,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474304695] [2024-10-24 19:15:12,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:15:12,266 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:12,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:15:12,269 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:15:12,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2024-10-24 19:15:12,337 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 19:15:12,337 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:15:12,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 19:15:12,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:15:12,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-24 19:15:12,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:15:12,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:15:12,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-24 19:15:12,478 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:15:12,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-24 19:15:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-24 19:15:12,564 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:15:12,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:15:12,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474304695] [2024-10-24 19:15:12,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474304695] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:15:12,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:15:12,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:15:12,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31492050] [2024-10-24 19:15:12,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:15:12,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 19:15:12,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:15:12,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 19:15:12,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-24 19:15:12,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-24 19:15:12,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 211 transitions, 2003 flow. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:12,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:15:12,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-24 19:15:12,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:15:13,588 INFO L124 PetriNetUnfolderBase]: 2717/5452 cut-off events. [2024-10-24 19:15:13,588 INFO L125 PetriNetUnfolderBase]: For 8218/8327 co-relation queries the response was YES. [2024-10-24 19:15:13,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15469 conditions, 5452 events. 2717/5452 cut-off events. For 8218/8327 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 39156 event pairs, 1138 based on Foata normal form. 32/5462 useless extension candidates. Maximal degree in co-relation 15268. Up to 2187 conditions per place. [2024-10-24 19:15:13,612 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 218 selfloop transitions, 35 changer transitions 0/265 dead transitions. [2024-10-24 19:15:13,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 265 transitions, 2783 flow [2024-10-24 19:15:13,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:15:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:15:13,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2024-10-24 19:15:13,613 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-10-24 19:15:13,613 INFO L175 Difference]: Start difference. First operand has 149 places, 211 transitions, 2003 flow. Second operand 6 states and 213 transitions. [2024-10-24 19:15:13,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 265 transitions, 2783 flow [2024-10-24 19:15:13,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 265 transitions, 2749 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-10-24 19:15:13,633 INFO L231 Difference]: Finished difference. Result has 152 places, 217 transitions, 2113 flow [2024-10-24 19:15:13,633 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1973, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2113, PETRI_PLACES=152, PETRI_TRANSITIONS=217} [2024-10-24 19:15:13,634 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 94 predicate places. [2024-10-24 19:15:13,634 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 217 transitions, 2113 flow [2024-10-24 19:15:13,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:13,634 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:15:13,634 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:15:13,639 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 (19)] Forceful destruction successful, exit code 0 [2024-10-24 19:15:13,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:13,835 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:15:13,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:15:13,835 INFO L85 PathProgramCache]: Analyzing trace with hash 184978279, now seen corresponding path program 2 times [2024-10-24 19:15:13,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:15:13,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789504587] [2024-10-24 19:15:13,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:15:13,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:13,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:15:13,837 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:15:13,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2024-10-24 19:15:13,923 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:15:13,923 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:15:13,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-24 19:15:13,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:15:13,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-24 19:15:13,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 19:15:13,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:15:13,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:15:14,000 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:15:14,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-24 19:15:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:15:14,076 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:15:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:15:14,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:15:14,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789504587] [2024-10-24 19:15:14,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789504587] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:15:14,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:15:14,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-24 19:15:14,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465489941] [2024-10-24 19:15:14,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:15:14,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:15:14,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:15:14,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:15:14,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:15:16,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-24 19:15:20,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-24 19:15:24,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-24 19:15:30,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-24 19:15:30,697 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-10-24 19:15:30,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 217 transitions, 2113 flow. Second operand has 14 states, 14 states have (on average 23.0) internal successors, (322), 14 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:30,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:15:30,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-10-24 19:15:30,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:15:32,760 INFO L124 PetriNetUnfolderBase]: 3232/6538 cut-off events. [2024-10-24 19:15:32,760 INFO L125 PetriNetUnfolderBase]: For 12334/12566 co-relation queries the response was YES. [2024-10-24 19:15:32,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18925 conditions, 6538 events. 3232/6538 cut-off events. For 12334/12566 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 49079 event pairs, 869 based on Foata normal form. 62/6465 useless extension candidates. Maximal degree in co-relation 18666. Up to 1617 conditions per place. [2024-10-24 19:15:32,788 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 236 selfloop transitions, 68 changer transitions 0/323 dead transitions. [2024-10-24 19:15:32,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 323 transitions, 3249 flow [2024-10-24 19:15:32,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 19:15:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-24 19:15:32,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 414 transitions. [2024-10-24 19:15:32,790 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5307692307692308 [2024-10-24 19:15:32,790 INFO L175 Difference]: Start difference. First operand has 152 places, 217 transitions, 2113 flow. Second operand 13 states and 414 transitions. [2024-10-24 19:15:32,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 323 transitions, 3249 flow [2024-10-24 19:15:32,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 323 transitions, 3191 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-10-24 19:15:32,815 INFO L231 Difference]: Finished difference. Result has 162 places, 231 transitions, 2372 flow [2024-10-24 19:15:32,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2372, PETRI_PLACES=162, PETRI_TRANSITIONS=231} [2024-10-24 19:15:32,816 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 104 predicate places. [2024-10-24 19:15:32,816 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 231 transitions, 2372 flow [2024-10-24 19:15:32,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.0) internal successors, (322), 14 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:32,816 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:15:32,816 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:15:32,822 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 (20)] Ended with exit code 0 [2024-10-24 19:15:33,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:33,017 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:15:33,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:15:33,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1439359939, now seen corresponding path program 1 times [2024-10-24 19:15:33,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:15:33,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234724180] [2024-10-24 19:15:33,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:15:33,018 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:33,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:15:33,019 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:15:33,020 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 (21)] Waiting until timeout for monitored process [2024-10-24 19:15:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:15:33,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 19:15:33,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:15:33,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:15:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 19:15:33,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:15:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 19:15:33,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:15:33,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234724180] [2024-10-24 19:15:33,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234724180] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:15:33,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:15:33,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-24 19:15:33,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649634697] [2024-10-24 19:15:33,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:15:33,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:15:33,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:15:33,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:15:33,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:15:34,986 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-24 19:15:34,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 231 transitions, 2372 flow. Second operand has 14 states, 14 states have (on average 27.785714285714285) internal successors, (389), 14 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:34,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:15:34,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-24 19:15:34,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:15:37,391 INFO L124 PetriNetUnfolderBase]: 5522/10738 cut-off events. [2024-10-24 19:15:37,391 INFO L125 PetriNetUnfolderBase]: For 16269/16289 co-relation queries the response was YES. [2024-10-24 19:15:37,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31105 conditions, 10738 events. 5522/10738 cut-off events. For 16269/16289 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 79389 event pairs, 732 based on Foata normal form. 212/10915 useless extension candidates. Maximal degree in co-relation 30845. Up to 2265 conditions per place. [2024-10-24 19:15:37,444 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 324 selfloop transitions, 72 changer transitions 0/418 dead transitions. [2024-10-24 19:15:37,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 418 transitions, 4065 flow [2024-10-24 19:15:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:15:37,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:15:37,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 489 transitions. [2024-10-24 19:15:37,447 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6791666666666667 [2024-10-24 19:15:37,447 INFO L175 Difference]: Start difference. First operand has 162 places, 231 transitions, 2372 flow. Second operand 12 states and 489 transitions. [2024-10-24 19:15:37,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 418 transitions, 4065 flow [2024-10-24 19:15:37,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 418 transitions, 3992 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-10-24 19:15:37,479 INFO L231 Difference]: Finished difference. Result has 173 places, 243 transitions, 2615 flow [2024-10-24 19:15:37,479 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2615, PETRI_PLACES=173, PETRI_TRANSITIONS=243} [2024-10-24 19:15:37,479 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 115 predicate places. [2024-10-24 19:15:37,479 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 243 transitions, 2615 flow [2024-10-24 19:15:37,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 27.785714285714285) internal successors, (389), 14 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:37,480 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:15:37,480 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:15:37,484 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 (21)] Ended with exit code 0 [2024-10-24 19:15:37,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:37,680 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:15:37,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:15:37,681 INFO L85 PathProgramCache]: Analyzing trace with hash -558632727, now seen corresponding path program 2 times [2024-10-24 19:15:37,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:15:37,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752035694] [2024-10-24 19:15:37,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:15:37,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:37,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:15:37,682 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:15:37,683 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 (22)] Waiting until timeout for monitored process [2024-10-24 19:15:37,744 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 19:15:37,744 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:15:37,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 19:15:37,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:15:37,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-24 19:15:37,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:15:37,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:15:37,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-24 19:15:37,854 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:15:37,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-24 19:15:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-24 19:15:37,959 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:15:37,959 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:15:37,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752035694] [2024-10-24 19:15:37,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752035694] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:15:37,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:15:37,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:15:37,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496997545] [2024-10-24 19:15:37,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:15:37,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 19:15:37,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:15:37,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 19:15:37,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-24 19:15:38,205 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-24 19:15:38,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 243 transitions, 2615 flow. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:38,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:15:38,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-24 19:15:38,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:15:39,998 INFO L124 PetriNetUnfolderBase]: 6353/12498 cut-off events. [2024-10-24 19:15:39,998 INFO L125 PetriNetUnfolderBase]: For 27684/27816 co-relation queries the response was YES. [2024-10-24 19:15:40,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38474 conditions, 12498 events. 6353/12498 cut-off events. For 27684/27816 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 98416 event pairs, 2885 based on Foata normal form. 83/12426 useless extension candidates. Maximal degree in co-relation 38206. Up to 5637 conditions per place. [2024-10-24 19:15:40,075 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 248 selfloop transitions, 37 changer transitions 0/308 dead transitions. [2024-10-24 19:15:40,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 308 transitions, 3719 flow [2024-10-24 19:15:40,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:15:40,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:15:40,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 210 transitions. [2024-10-24 19:15:40,077 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-10-24 19:15:40,077 INFO L175 Difference]: Start difference. First operand has 173 places, 243 transitions, 2615 flow. Second operand 6 states and 210 transitions. [2024-10-24 19:15:40,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 308 transitions, 3719 flow [2024-10-24 19:15:40,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 308 transitions, 3642 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-10-24 19:15:40,120 INFO L231 Difference]: Finished difference. Result has 177 places, 251 transitions, 2719 flow [2024-10-24 19:15:40,121 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2546, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2719, PETRI_PLACES=177, PETRI_TRANSITIONS=251} [2024-10-24 19:15:40,121 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 119 predicate places. [2024-10-24 19:15:40,121 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 251 transitions, 2719 flow [2024-10-24 19:15:40,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:40,122 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:15:40,122 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:15:40,125 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 (22)] Ended with exit code 0 [2024-10-24 19:15:40,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:40,322 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:15:40,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:15:40,323 INFO L85 PathProgramCache]: Analyzing trace with hash -953798583, now seen corresponding path program 2 times [2024-10-24 19:15:40,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:15:40,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088399452] [2024-10-24 19:15:40,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:15:40,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:40,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:15:40,325 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:15:40,326 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 (23)] Waiting until timeout for monitored process [2024-10-24 19:15:40,413 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:15:40,413 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:15:40,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 19:15:40,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:15:40,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-24 19:15:40,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:15:40,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:15:40,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-24 19:15:40,498 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:15:40,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-24 19:15:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 19:15:40,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:15:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 19:15:41,063 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:15:41,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088399452] [2024-10-24 19:15:41,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088399452] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:15:41,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:15:41,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-24 19:15:41,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831192682] [2024-10-24 19:15:41,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:15:41,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:15:41,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:15:41,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:15:41,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-10-24 19:15:45,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-24 19:15:46,611 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-10-24 19:15:46,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 251 transitions, 2719 flow. Second operand has 12 states, 12 states have (on average 25.666666666666668) internal successors, (308), 12 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:46,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:15:46,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-10-24 19:15:46,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:15:50,398 INFO L124 PetriNetUnfolderBase]: 11865/23498 cut-off events. [2024-10-24 19:15:50,398 INFO L125 PetriNetUnfolderBase]: For 57225/57631 co-relation queries the response was YES. [2024-10-24 19:15:50,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73190 conditions, 23498 events. 11865/23498 cut-off events. For 57225/57631 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 202039 event pairs, 1936 based on Foata normal form. 607/23913 useless extension candidates. Maximal degree in co-relation 72920. Up to 3760 conditions per place. [2024-10-24 19:15:50,554 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 415 selfloop transitions, 50 changer transitions 0/488 dead transitions. [2024-10-24 19:15:50,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 488 transitions, 5625 flow [2024-10-24 19:15:50,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:15:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:15:50,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 437 transitions. [2024-10-24 19:15:50,556 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6069444444444444 [2024-10-24 19:15:50,556 INFO L175 Difference]: Start difference. First operand has 177 places, 251 transitions, 2719 flow. Second operand 12 states and 437 transitions. [2024-10-24 19:15:50,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 488 transitions, 5625 flow [2024-10-24 19:15:50,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 488 transitions, 5551 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-10-24 19:15:50,778 INFO L231 Difference]: Finished difference. Result has 188 places, 263 transitions, 2907 flow [2024-10-24 19:15:50,779 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2907, PETRI_PLACES=188, PETRI_TRANSITIONS=263} [2024-10-24 19:15:50,779 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 130 predicate places. [2024-10-24 19:15:50,779 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 263 transitions, 2907 flow [2024-10-24 19:15:50,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 25.666666666666668) internal successors, (308), 12 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:50,779 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:15:50,780 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:15:50,784 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 (23)] Ended with exit code 0 [2024-10-24 19:15:50,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:50,980 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:15:50,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:15:50,981 INFO L85 PathProgramCache]: Analyzing trace with hash 524540466, now seen corresponding path program 1 times [2024-10-24 19:15:50,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:15:50,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669403881] [2024-10-24 19:15:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:15:50,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:15:50,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:15:50,982 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:15:50,983 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 (24)] Waiting until timeout for monitored process [2024-10-24 19:15:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:15:51,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 19:15:51,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:15:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:15:51,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:15:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:15:51,737 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:15:51,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669403881] [2024-10-24 19:15:51,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669403881] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:15:51,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:15:51,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2024-10-24 19:15:51,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166281864] [2024-10-24 19:15:51,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:15:51,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 19:15:51,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:15:51,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 19:15:51,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-10-24 19:15:52,100 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-24 19:15:52,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 263 transitions, 2907 flow. Second operand has 16 states, 16 states have (on average 33.25) internal successors, (532), 16 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:15:52,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:15:52,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-24 19:15:52,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand