./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 20:00:20,800 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 20:00:20,854 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 20:00:20,862 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 20:00:20,863 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 20:00:20,896 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 20:00:20,897 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 20:00:20,897 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 20:00:20,898 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 20:00:20,898 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 20:00:20,899 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 20:00:20,899 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 20:00:20,900 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 20:00:20,900 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 20:00:20,901 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 20:00:20,901 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 20:00:20,901 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 20:00:20,902 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 20:00:20,902 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 20:00:20,902 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 20:00:20,903 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 20:00:20,907 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 20:00:20,907 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 20:00:20,908 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 20:00:20,909 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 20:00:20,909 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 20:00:20,909 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 20:00:20,910 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 20:00:20,910 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 20:00:20,910 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 20:00:20,911 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 20:00:20,911 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 20:00:20,911 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 20:00:20,911 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 20:00:20,912 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 20:00:20,912 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 20:00:20,912 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 20:00:20,913 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 20:00:20,914 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 20:00:20,914 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 20:00:20,914 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 20:00:20,915 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 20:00:20,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b [2024-10-14 20:00:21,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 20:00:21,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 20:00:21,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 20:00:21,208 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 20:00:21,208 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 20:00:21,209 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2024-10-14 20:00:22,575 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 20:00:22,755 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 20:00:22,756 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2024-10-14 20:00:22,763 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21fd81503/372130a214e345c199d14ba219dd0a23/FLAGffb2001e6 [2024-10-14 20:00:22,777 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21fd81503/372130a214e345c199d14ba219dd0a23 [2024-10-14 20:00:22,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 20:00:22,781 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 20:00:22,782 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 20:00:22,783 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 20:00:22,788 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 20:00:22,789 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:00:22" (1/1) ... [2024-10-14 20:00:22,789 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5826d1b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:22, skipping insertion in model container [2024-10-14 20:00:22,790 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:00:22" (1/1) ... [2024-10-14 20:00:22,810 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 20:00:23,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 20:00:23,055 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-10-14 20:00:23,056 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@60774d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:23, skipping insertion in model container [2024-10-14 20:00:23,056 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 20:00:23,057 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-14 20:00:23,059 INFO L158 Benchmark]: Toolchain (without parser) took 277.25ms. Allocated memory is still 163.6MB. Free memory was 87.7MB in the beginning and 134.1MB in the end (delta: -46.5MB). Peak memory consumption was 16.2MB. Max. memory is 16.1GB. [2024-10-14 20:00:23,060 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 163.6MB. Free memory was 131.8MB in the beginning and 131.5MB in the end (delta: 243.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 20:00:23,061 INFO L158 Benchmark]: CACSL2BoogieTranslator took 274.78ms. Allocated memory is still 163.6MB. Free memory was 87.4MB in the beginning and 134.2MB in the end (delta: -46.7MB). Peak memory consumption was 16.2MB. Max. memory is 16.1GB. [2024-10-14 20:00:23,062 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 163.6MB. Free memory was 131.8MB in the beginning and 131.5MB in the end (delta: 243.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 274.78ms. Allocated memory is still 163.6MB. Free memory was 87.4MB in the beginning and 134.2MB in the end (delta: -46.7MB). Peak memory consumption was 16.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 100]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 20:00:25,087 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 20:00:25,143 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-14 20:00:25,153 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 20:00:25,154 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 20:00:25,185 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 20:00:25,188 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 20:00:25,188 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 20:00:25,189 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 20:00:25,189 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 20:00:25,189 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 20:00:25,190 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 20:00:25,191 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 20:00:25,192 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 20:00:25,192 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 20:00:25,192 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 20:00:25,193 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 20:00:25,193 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 20:00:25,193 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 20:00:25,193 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 20:00:25,194 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 20:00:25,194 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 20:00:25,194 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 20:00:25,195 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 20:00:25,195 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 20:00:25,195 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-14 20:00:25,195 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 20:00:25,196 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-14 20:00:25,196 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 20:00:25,196 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 20:00:25,197 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 20:00:25,197 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 20:00:25,197 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 20:00:25,197 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 20:00:25,197 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 20:00:25,198 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 20:00:25,198 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 20:00:25,198 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 20:00:25,198 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-14 20:00:25,199 INFO L153 SettingsManager]: * Command for external solver=cvc5 --incremental --print-success --lang smt [2024-10-14 20:00:25,199 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 20:00:25,199 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 20:00:25,199 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 20:00:25,199 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 20:00:25,200 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-14 20:00:25,200 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b [2024-10-14 20:00:25,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 20:00:25,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 20:00:25,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 20:00:25,543 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 20:00:25,545 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 20:00:25,547 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2024-10-14 20:00:27,094 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 20:00:27,293 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 20:00:27,294 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2024-10-14 20:00:27,301 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac7bf0170/348cf612ff33497ea6cd51731f576a4f/FLAG5aae7c0ec [2024-10-14 20:00:27,313 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac7bf0170/348cf612ff33497ea6cd51731f576a4f [2024-10-14 20:00:27,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 20:00:27,316 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 20:00:27,318 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 20:00:27,318 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 20:00:27,323 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 20:00:27,324 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:00:27" (1/1) ... [2024-10-14 20:00:27,327 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ae21a30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:27, skipping insertion in model container [2024-10-14 20:00:27,327 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:00:27" (1/1) ... [2024-10-14 20:00:27,349 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 20:00:27,581 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 20:00:27,604 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-14 20:00:27,607 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 20:00:27,630 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 20:00:27,637 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 20:00:27,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 20:00:27,690 INFO L204 MainTranslator]: Completed translation [2024-10-14 20:00:27,691 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:27 WrapperNode [2024-10-14 20:00:27,691 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 20:00:27,692 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 20:00:27,692 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 20:00:27,692 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 20:00:27,698 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:27" (1/1) ... [2024-10-14 20:00:27,710 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:27" (1/1) ... [2024-10-14 20:00:27,738 INFO L138 Inliner]: procedures = 25, calls = 24, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 134 [2024-10-14 20:00:27,739 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 20:00:27,743 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 20:00:27,743 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 20:00:27,743 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 20:00:27,754 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:27" (1/1) ... [2024-10-14 20:00:27,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:27" (1/1) ... [2024-10-14 20:00:27,760 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:27" (1/1) ... [2024-10-14 20:00:27,789 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-14 20:00:27,792 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:27" (1/1) ... [2024-10-14 20:00:27,792 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:27" (1/1) ... [2024-10-14 20:00:27,803 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:27" (1/1) ... [2024-10-14 20:00:27,810 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:27" (1/1) ... [2024-10-14 20:00:27,812 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:27" (1/1) ... [2024-10-14 20:00:27,816 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:27" (1/1) ... [2024-10-14 20:00:27,819 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 20:00:27,824 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 20:00:27,824 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 20:00:27,824 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 20:00:27,825 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:27" (1/1) ... [2024-10-14 20:00:27,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 20:00:27,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 20:00:27,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 20:00:27,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 20:00:27,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 20:00:27,914 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 20:00:27,914 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 20:00:27,914 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 20:00:27,915 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 20:00:27,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-14 20:00:27,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-14 20:00:27,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 20:00:27,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-14 20:00:27,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-14 20:00:27,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 20:00:27,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 20:00:27,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-14 20:00:27,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-14 20:00:27,919 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 20:00:28,067 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 20:00:28,069 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 20:00:28,429 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 20:00:28,430 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 20:00:28,696 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 20:00:28,696 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-14 20:00:28,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:00:28 BoogieIcfgContainer [2024-10-14 20:00:28,697 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 20:00:28,699 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 20:00:28,699 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 20:00:28,702 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 20:00:28,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:00:27" (1/3) ... [2024-10-14 20:00:28,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e71f130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:00:28, skipping insertion in model container [2024-10-14 20:00:28,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:27" (2/3) ... [2024-10-14 20:00:28,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e71f130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:00:28, skipping insertion in model container [2024-10-14 20:00:28,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:00:28" (3/3) ... [2024-10-14 20:00:28,705 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2024-10-14 20:00:28,720 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 20:00:28,721 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-10-14 20:00:28,721 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 20:00:28,786 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 20:00:28,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 40 transitions, 94 flow [2024-10-14 20:00:28,858 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2024-10-14 20:00:28,859 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 20:00:28,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 4/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 74 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-10-14 20:00:28,863 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 40 transitions, 94 flow [2024-10-14 20:00:28,867 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 37 transitions, 86 flow [2024-10-14 20:00:28,879 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 20:00:28,888 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;@6de29583, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 20:00:28,888 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-10-14 20:00:28,894 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 20:00:28,895 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-14 20:00:28,895 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 20:00:28,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:28,896 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 20:00:28,897 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:00:28,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:28,903 INFO L85 PathProgramCache]: Analyzing trace with hash 462752, now seen corresponding path program 1 times [2024-10-14 20:00:28,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:28,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389283035] [2024-10-14 20:00:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:28,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:28,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:28,932 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:28,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-14 20:00:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:28,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 20:00:28,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:29,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 20:00:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:29,072 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:29,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:29,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389283035] [2024-10-14 20:00:29,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389283035] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:29,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:29,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 20:00:29,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070504314] [2024-10-14 20:00:29,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:29,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 20:00:29,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:29,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 20:00:29,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 20:00:29,141 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-10-14 20:00:29,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:29,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:29,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-10-14 20:00:29,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:29,293 INFO L124 PetriNetUnfolderBase]: 110/251 cut-off events. [2024-10-14 20:00:29,294 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-10-14 20:00:29,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 251 events. 110/251 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1109 event pairs, 75 based on Foata normal form. 1/199 useless extension candidates. Maximal degree in co-relation 398. Up to 185 conditions per place. [2024-10-14 20:00:29,299 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 21 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-10-14 20:00:29,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 34 transitions, 126 flow [2024-10-14 20:00:29,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 20:00:29,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 20:00:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-10-14 20:00:29,310 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-10-14 20:00:29,312 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 86 flow. Second operand 3 states and 67 transitions. [2024-10-14 20:00:29,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 34 transitions, 126 flow [2024-10-14 20:00:29,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 118 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 20:00:29,323 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 76 flow [2024-10-14 20:00:29,334 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2024-10-14 20:00:29,338 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2024-10-14 20:00:29,338 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 76 flow [2024-10-14 20:00:29,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:29,338 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:29,339 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 20:00:29,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2024-10-14 20:00:29,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:29,540 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:00:29,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:29,541 INFO L85 PathProgramCache]: Analyzing trace with hash 462753, now seen corresponding path program 1 times [2024-10-14 20:00:29,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:29,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813556001] [2024-10-14 20:00:29,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:29,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:29,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:29,544 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:29,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-14 20:00:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:29,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 20:00:29,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:29,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 20:00:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:29,741 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:29,741 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:29,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813556001] [2024-10-14 20:00:29,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813556001] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:29,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:29,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 20:00:29,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140265973] [2024-10-14 20:00:29,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:29,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 20:00:29,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:29,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 20:00:29,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 20:00:29,796 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-10-14 20:00:29,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:29,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:29,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-10-14 20:00:29,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:30,058 INFO L124 PetriNetUnfolderBase]: 110/253 cut-off events. [2024-10-14 20:00:30,058 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-10-14 20:00:30,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 253 events. 110/253 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1113 event pairs, 75 based on Foata normal form. 1/201 useless extension candidates. Maximal degree in co-relation 434. Up to 189 conditions per place. [2024-10-14 20:00:30,062 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 24 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2024-10-14 20:00:30,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 36 transitions, 132 flow [2024-10-14 20:00:30,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 20:00:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 20:00:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-10-14 20:00:30,065 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-10-14 20:00:30,065 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 76 flow. Second operand 3 states and 70 transitions. [2024-10-14 20:00:30,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 36 transitions, 132 flow [2024-10-14 20:00:30,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 128 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 20:00:30,067 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 86 flow [2024-10-14 20:00:30,068 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-10-14 20:00:30,069 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2024-10-14 20:00:30,069 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 86 flow [2024-10-14 20:00:30,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:30,069 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:30,070 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-14 20:00:30,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-10-14 20:00:30,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:30,273 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:00:30,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:30,274 INFO L85 PathProgramCache]: Analyzing trace with hash 444720560, now seen corresponding path program 1 times [2024-10-14 20:00:30,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:30,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124742106] [2024-10-14 20:00:30,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:30,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:30,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:30,279 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:30,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-14 20:00:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:30,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 20:00:30,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:30,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 20:00:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:30,508 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:30,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:30,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124742106] [2024-10-14 20:00:30,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124742106] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:00:30,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:00:30,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 20:00:30,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111125066] [2024-10-14 20:00:30,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:00:30,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 20:00:30,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:30,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 20:00:30,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-14 20:00:31,085 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-10-14 20:00:31,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 86 flow. Second operand has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:31,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:31,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-10-14 20:00:31,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:31,562 INFO L124 PetriNetUnfolderBase]: 113/262 cut-off events. [2024-10-14 20:00:31,562 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-10-14 20:00:31,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 262 events. 113/262 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1150 event pairs, 75 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 469. Up to 192 conditions per place. [2024-10-14 20:00:31,564 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 24 selfloop transitions, 11 changer transitions 0/45 dead transitions. [2024-10-14 20:00:31,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 45 transitions, 188 flow [2024-10-14 20:00:31,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 20:00:31,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 20:00:31,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-10-14 20:00:31,569 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-10-14 20:00:31,570 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 86 flow. Second operand 9 states and 164 transitions. [2024-10-14 20:00:31,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 45 transitions, 188 flow [2024-10-14 20:00:31,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 20:00:31,572 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 158 flow [2024-10-14 20:00:31,573 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=158, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2024-10-14 20:00:31,573 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 6 predicate places. [2024-10-14 20:00:31,573 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 158 flow [2024-10-14 20:00:31,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:31,574 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:31,574 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:31,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2024-10-14 20:00:31,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:31,776 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:00:31,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:31,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1301294496, now seen corresponding path program 1 times [2024-10-14 20:00:31,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:31,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139727815] [2024-10-14 20:00:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:31,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:31,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:31,780 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:31,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-14 20:00:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:31,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 20:00:31,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:31,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 20:00:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:00:31,865 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:31,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:31,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139727815] [2024-10-14 20:00:31,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139727815] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:31,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:31,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 20:00:31,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110975459] [2024-10-14 20:00:31,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:31,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 20:00:31,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:31,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 20:00:31,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 20:00:31,941 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-10-14 20:00:31,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:31,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:31,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-10-14 20:00:31,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:32,053 INFO L124 PetriNetUnfolderBase]: 113/235 cut-off events. [2024-10-14 20:00:32,054 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-10-14 20:00:32,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 235 events. 113/235 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 882 event pairs, 75 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 446. Up to 187 conditions per place. [2024-10-14 20:00:32,057 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 29 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2024-10-14 20:00:32,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 218 flow [2024-10-14 20:00:32,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 20:00:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 20:00:32,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-10-14 20:00:32,058 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-10-14 20:00:32,059 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 158 flow. Second operand 4 states and 67 transitions. [2024-10-14 20:00:32,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 218 flow [2024-10-14 20:00:32,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 204 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-14 20:00:32,062 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 146 flow [2024-10-14 20:00:32,062 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2024-10-14 20:00:32,062 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2024-10-14 20:00:32,063 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 146 flow [2024-10-14 20:00:32,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:32,063 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:32,063 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:32,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-14 20:00:32,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:32,264 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:00:32,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:32,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1301294495, now seen corresponding path program 1 times [2024-10-14 20:00:32,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:32,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106407094] [2024-10-14 20:00:32,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:32,266 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 [2024-10-14 20:00:32,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:32,267 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:32,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-14 20:00:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:32,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 20:00:32,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:32,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:32,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-10-14 20:00:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:32,661 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:32,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106407094] [2024-10-14 20:00:32,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106407094] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:00:32,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:00:32,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-10-14 20:00:32,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254727277] [2024-10-14 20:00:32,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:00:32,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 20:00:32,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:32,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 20:00:32,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-14 20:00:32,967 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-10-14 20:00:32,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 146 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:32,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:32,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-10-14 20:00:32,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:33,317 INFO L124 PetriNetUnfolderBase]: 234/436 cut-off events. [2024-10-14 20:00:33,317 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-10-14 20:00:33,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 436 events. 234/436 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1826 event pairs, 82 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 852. Up to 220 conditions per place. [2024-10-14 20:00:33,321 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 44 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-10-14 20:00:33,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 58 transitions, 287 flow [2024-10-14 20:00:33,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 20:00:33,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 20:00:33,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-10-14 20:00:33,323 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5458333333333333 [2024-10-14 20:00:33,323 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 146 flow. Second operand 6 states and 131 transitions. [2024-10-14 20:00:33,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 58 transitions, 287 flow [2024-10-14 20:00:33,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 58 transitions, 281 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 20:00:33,325 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 167 flow [2024-10-14 20:00:33,325 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=167, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2024-10-14 20:00:33,326 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2024-10-14 20:00:33,326 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 167 flow [2024-10-14 20:00:33,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:33,327 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:33,327 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:33,331 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 (6)] Forceful destruction successful, exit code 0 [2024-10-14 20:00:33,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:33,530 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:00:33,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:33,531 INFO L85 PathProgramCache]: Analyzing trace with hash -731836715, now seen corresponding path program 1 times [2024-10-14 20:00:33,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:33,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [971073912] [2024-10-14 20:00:33,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:33,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:33,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:33,535 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:33,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-14 20:00:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:33,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 20:00:33,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:33,719 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:33,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-10-14 20:00:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:33,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:33,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [971073912] [2024-10-14 20:00:33,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [971073912] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:00:33,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:00:33,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-10-14 20:00:33,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106630283] [2024-10-14 20:00:33,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:00:33,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 20:00:33,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:33,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 20:00:33,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-14 20:00:34,131 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-10-14 20:00:34,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 167 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:34,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:34,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-10-14 20:00:34,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:34,480 INFO L124 PetriNetUnfolderBase]: 419/733 cut-off events. [2024-10-14 20:00:34,480 INFO L125 PetriNetUnfolderBase]: For 97/121 co-relation queries the response was YES. [2024-10-14 20:00:34,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1586 conditions, 733 events. 419/733 cut-off events. For 97/121 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3103 event pairs, 123 based on Foata normal form. 0/585 useless extension candidates. Maximal degree in co-relation 1552. Up to 427 conditions per place. [2024-10-14 20:00:34,486 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 44 selfloop transitions, 9 changer transitions 0/57 dead transitions. [2024-10-14 20:00:34,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 310 flow [2024-10-14 20:00:34,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 20:00:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 20:00:34,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-10-14 20:00:34,491 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49583333333333335 [2024-10-14 20:00:34,491 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 167 flow. Second operand 6 states and 119 transitions. [2024-10-14 20:00:34,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 310 flow [2024-10-14 20:00:34,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 302 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 20:00:34,493 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 196 flow [2024-10-14 20:00:34,494 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-10-14 20:00:34,495 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 11 predicate places. [2024-10-14 20:00:34,497 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 196 flow [2024-10-14 20:00:34,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:34,497 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:34,498 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:34,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-14 20:00:34,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:34,698 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:00:34,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:34,699 INFO L85 PathProgramCache]: Analyzing trace with hash -708511515, now seen corresponding path program 1 times [2024-10-14 20:00:34,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:34,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767364102] [2024-10-14 20:00:34,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:34,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:34,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:34,701 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:34,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-14 20:00:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:34,765 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 20:00:34,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:34,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 20:00:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:00:35,023 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:00:35,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:35,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767364102] [2024-10-14 20:00:35,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767364102] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:00:35,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:00:35,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2024-10-14 20:00:35,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063894564] [2024-10-14 20:00:35,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:00:35,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-14 20:00:35,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:35,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-14 20:00:35,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-10-14 20:00:37,232 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-10-14 20:00:37,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 196 flow. Second operand has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 11 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) [2024-10-14 20:00:37,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:37,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-10-14 20:00:37,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:38,556 INFO L124 PetriNetUnfolderBase]: 1077/1973 cut-off events. [2024-10-14 20:00:38,556 INFO L125 PetriNetUnfolderBase]: For 185/185 co-relation queries the response was YES. [2024-10-14 20:00:38,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4396 conditions, 1973 events. 1077/1973 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10842 event pairs, 693 based on Foata normal form. 0/1677 useless extension candidates. Maximal degree in co-relation 2989. Up to 635 conditions per place. [2024-10-14 20:00:38,567 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 93 selfloop transitions, 16 changer transitions 0/114 dead transitions. [2024-10-14 20:00:38,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 114 transitions, 612 flow [2024-10-14 20:00:38,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 20:00:38,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 20:00:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-10-14 20:00:38,571 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5675 [2024-10-14 20:00:38,571 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 196 flow. Second operand 10 states and 227 transitions. [2024-10-14 20:00:38,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 114 transitions, 612 flow [2024-10-14 20:00:38,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 114 transitions, 592 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 20:00:38,578 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 252 flow [2024-10-14 20:00:38,578 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=252, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2024-10-14 20:00:38,579 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 18 predicate places. [2024-10-14 20:00:38,580 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 252 flow [2024-10-14 20:00:38,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 11 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) [2024-10-14 20:00:38,581 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:38,581 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:38,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-14 20:00:38,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:38,782 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:00:38,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:38,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1212101200, now seen corresponding path program 1 times [2024-10-14 20:00:38,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:38,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791063479] [2024-10-14 20:00:38,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:38,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:38,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:38,786 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:38,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-14 20:00:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:38,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 20:00:38,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:38,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 20:00:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:39,102 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:39,775 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:39,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791063479] [2024-10-14 20:00:39,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791063479] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:00:39,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:00:39,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2024-10-14 20:00:39,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361124908] [2024-10-14 20:00:39,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:00:39,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-14 20:00:39,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:39,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-14 20:00:39,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-10-14 20:00:40,361 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-10-14 20:00:40,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 252 flow. Second operand has 11 states, 11 states have (on average 13.0) internal successors, (143), 11 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:40,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:40,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-10-14 20:00:40,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:41,748 INFO L124 PetriNetUnfolderBase]: 1105/1917 cut-off events. [2024-10-14 20:00:41,748 INFO L125 PetriNetUnfolderBase]: For 970/994 co-relation queries the response was YES. [2024-10-14 20:00:41,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4708 conditions, 1917 events. 1105/1917 cut-off events. For 970/994 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 9479 event pairs, 663 based on Foata normal form. 0/1773 useless extension candidates. Maximal degree in co-relation 3704. Up to 681 conditions per place. [2024-10-14 20:00:41,782 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 79 selfloop transitions, 20 changer transitions 0/102 dead transitions. [2024-10-14 20:00:41,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 102 transitions, 606 flow [2024-10-14 20:00:41,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 20:00:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 20:00:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-10-14 20:00:41,784 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5075 [2024-10-14 20:00:41,784 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 252 flow. Second operand 10 states and 203 transitions. [2024-10-14 20:00:41,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 102 transitions, 606 flow [2024-10-14 20:00:41,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 102 transitions, 598 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 20:00:41,791 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 344 flow [2024-10-14 20:00:41,792 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=344, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2024-10-14 20:00:41,792 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 26 predicate places. [2024-10-14 20:00:41,794 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 344 flow [2024-10-14 20:00:41,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.0) internal successors, (143), 11 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:41,794 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:41,794 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-14 20:00:41,800 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 [2024-10-14 20:00:41,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:41,995 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:00:41,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash -40732323, now seen corresponding path program 2 times [2024-10-14 20:00:41,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:41,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052032946] [2024-10-14 20:00:41,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 20:00:41,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:41,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:41,997 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:41,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-14 20:00:42,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 20:00:42,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 20:00:42,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 20:00:42,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:42,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 20:00:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:42,283 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:42,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:42,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052032946] [2024-10-14 20:00:42,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052032946] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:00:42,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:00:42,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 20:00:42,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868776473] [2024-10-14 20:00:42,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:00:42,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 20:00:42,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:42,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 20:00:42,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-14 20:00:43,235 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-10-14 20:00:43,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 344 flow. Second operand has 14 states, 14 states have (on average 15.571428571428571) internal successors, (218), 14 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:43,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:43,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-10-14 20:00:43,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:45,231 INFO L124 PetriNetUnfolderBase]: 1046/1860 cut-off events. [2024-10-14 20:00:45,231 INFO L125 PetriNetUnfolderBase]: For 1200/1214 co-relation queries the response was YES. [2024-10-14 20:00:45,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5138 conditions, 1860 events. 1046/1860 cut-off events. For 1200/1214 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9775 event pairs, 810 based on Foata normal form. 6/1864 useless extension candidates. Maximal degree in co-relation 4030. Up to 1695 conditions per place. [2024-10-14 20:00:45,244 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 43 selfloop transitions, 29 changer transitions 0/78 dead transitions. [2024-10-14 20:00:45,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 78 transitions, 668 flow [2024-10-14 20:00:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-14 20:00:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-14 20:00:45,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 353 transitions. [2024-10-14 20:00:45,247 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42023809523809524 [2024-10-14 20:00:45,247 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 344 flow. Second operand 21 states and 353 transitions. [2024-10-14 20:00:45,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 78 transitions, 668 flow [2024-10-14 20:00:45,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 78 transitions, 643 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 20:00:45,257 INFO L231 Difference]: Finished difference. Result has 88 places, 78 transitions, 587 flow [2024-10-14 20:00:45,257 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=587, PETRI_PLACES=88, PETRI_TRANSITIONS=78} [2024-10-14 20:00:45,258 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 48 predicate places. [2024-10-14 20:00:45,258 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 78 transitions, 587 flow [2024-10-14 20:00:45,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.571428571428571) internal successors, (218), 14 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:45,258 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:45,258 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:45,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-10-14 20:00:45,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:45,462 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:00:45,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:45,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1548659032, now seen corresponding path program 2 times [2024-10-14 20:00:45,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:45,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001230765] [2024-10-14 20:00:45,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 20:00:45,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:45,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:45,466 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:45,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-14 20:00:45,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 20:00:45,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 20:00:45,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 20:00:45,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:45,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 20:00:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-14 20:00:45,753 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-14 20:00:46,275 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:46,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001230765] [2024-10-14 20:00:46,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001230765] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:00:46,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:00:46,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-10-14 20:00:46,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866162246] [2024-10-14 20:00:46,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:00:46,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 20:00:46,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:46,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 20:00:46,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-14 20:00:46,990 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-10-14 20:00:46,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 78 transitions, 587 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:46,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:46,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-10-14 20:00:46,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:47,479 INFO L124 PetriNetUnfolderBase]: 1034/1824 cut-off events. [2024-10-14 20:00:47,479 INFO L125 PetriNetUnfolderBase]: For 1012/1012 co-relation queries the response was YES. [2024-10-14 20:00:47,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5079 conditions, 1824 events. 1034/1824 cut-off events. For 1012/1012 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9667 event pairs, 576 based on Foata normal form. 28/1852 useless extension candidates. Maximal degree in co-relation 5013. Up to 1264 conditions per place. [2024-10-14 20:00:47,490 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 74 selfloop transitions, 20 changer transitions 0/100 dead transitions. [2024-10-14 20:00:47,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 100 transitions, 870 flow [2024-10-14 20:00:47,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 20:00:47,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 20:00:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-10-14 20:00:47,493 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-10-14 20:00:47,493 INFO L175 Difference]: Start difference. First operand has 88 places, 78 transitions, 587 flow. Second operand 5 states and 105 transitions. [2024-10-14 20:00:47,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 100 transitions, 870 flow [2024-10-14 20:00:47,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 100 transitions, 776 flow, removed 33 selfloop flow, removed 10 redundant places. [2024-10-14 20:00:47,503 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 525 flow [2024-10-14 20:00:47,503 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=525, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2024-10-14 20:00:47,504 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 41 predicate places. [2024-10-14 20:00:47,504 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 525 flow [2024-10-14 20:00:47,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:47,505 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:47,505 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:47,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-10-14 20:00:47,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:47,708 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:00:47,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:47,708 INFO L85 PathProgramCache]: Analyzing trace with hash 40709021, now seen corresponding path program 2 times [2024-10-14 20:00:47,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:47,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623439928] [2024-10-14 20:00:47,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 20:00:47,709 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 [2024-10-14 20:00:47,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:47,710 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:47,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-14 20:00:47,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 20:00:47,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 20:00:47,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 20:00:47,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:47,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 20:00:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 20:00:47,942 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:47,942 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:47,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623439928] [2024-10-14 20:00:47,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623439928] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:47,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:47,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 20:00:47,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49619819] [2024-10-14 20:00:47,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:47,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 20:00:47,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:47,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 20:00:47,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 20:00:48,020 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-10-14 20:00:48,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 525 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:48,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:48,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-10-14 20:00:48,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:48,310 INFO L124 PetriNetUnfolderBase]: 1042/1798 cut-off events. [2024-10-14 20:00:48,310 INFO L125 PetriNetUnfolderBase]: For 1638/1638 co-relation queries the response was YES. [2024-10-14 20:00:48,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5146 conditions, 1798 events. 1042/1798 cut-off events. For 1638/1638 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9082 event pairs, 495 based on Foata normal form. 48/1844 useless extension candidates. Maximal degree in co-relation 5090. Up to 1057 conditions per place. [2024-10-14 20:00:48,321 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 58 selfloop transitions, 26 changer transitions 0/87 dead transitions. [2024-10-14 20:00:48,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 746 flow [2024-10-14 20:00:48,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 20:00:48,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 20:00:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-10-14 20:00:48,324 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-10-14 20:00:48,324 INFO L175 Difference]: Start difference. First operand has 81 places, 77 transitions, 525 flow. Second operand 5 states and 92 transitions. [2024-10-14 20:00:48,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 746 flow [2024-10-14 20:00:48,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 87 transitions, 678 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-14 20:00:48,330 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 505 flow [2024-10-14 20:00:48,330 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=505, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2024-10-14 20:00:48,331 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 36 predicate places. [2024-10-14 20:00:48,331 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 505 flow [2024-10-14 20:00:48,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:48,331 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:48,331 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:48,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2024-10-14 20:00:48,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:48,534 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:00:48,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:48,535 INFO L85 PathProgramCache]: Analyzing trace with hash 892773046, now seen corresponding path program 1 times [2024-10-14 20:00:48,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:48,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507789496] [2024-10-14 20:00:48,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:48,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:48,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:48,537 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:48,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-14 20:00:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:48,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 20:00:48,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:00:48,659 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:48,659 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:48,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507789496] [2024-10-14 20:00:48,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507789496] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:48,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:48,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 20:00:48,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644922943] [2024-10-14 20:00:48,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:48,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 20:00:48,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:48,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 20:00:48,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 20:00:48,689 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-10-14 20:00:48,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 505 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:48,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:48,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-10-14 20:00:48,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:48,852 INFO L124 PetriNetUnfolderBase]: 1031/1773 cut-off events. [2024-10-14 20:00:48,852 INFO L125 PetriNetUnfolderBase]: For 1184/1184 co-relation queries the response was YES. [2024-10-14 20:00:48,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5020 conditions, 1773 events. 1031/1773 cut-off events. For 1184/1184 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8811 event pairs, 303 based on Foata normal form. 3/1774 useless extension candidates. Maximal degree in co-relation 4966. Up to 1297 conditions per place. [2024-10-14 20:00:48,863 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 88 selfloop transitions, 8 changer transitions 1/100 dead transitions. [2024-10-14 20:00:48,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 100 transitions, 816 flow [2024-10-14 20:00:48,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 20:00:48,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 20:00:48,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-10-14 20:00:48,865 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-10-14 20:00:48,865 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 505 flow. Second operand 3 states and 85 transitions. [2024-10-14 20:00:48,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 100 transitions, 816 flow [2024-10-14 20:00:48,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 100 transitions, 746 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 20:00:48,870 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 533 flow [2024-10-14 20:00:48,870 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=533, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2024-10-14 20:00:48,871 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 35 predicate places. [2024-10-14 20:00:48,871 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 533 flow [2024-10-14 20:00:48,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:48,871 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:48,871 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:48,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2024-10-14 20:00:49,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:49,074 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:00:49,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:49,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1277123276, now seen corresponding path program 1 times [2024-10-14 20:00:49,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:49,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524551683] [2024-10-14 20:00:49,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:49,075 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:49,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:49,077 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:49,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-14 20:00:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:49,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 20:00:49,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:00:49,164 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:49,165 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:49,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524551683] [2024-10-14 20:00:49,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524551683] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:49,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:49,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 20:00:49,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079968406] [2024-10-14 20:00:49,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:49,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 20:00:49,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:49,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 20:00:49,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 20:00:49,169 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-10-14 20:00:49,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 533 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:49,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:49,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-10-14 20:00:49,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:49,401 INFO L124 PetriNetUnfolderBase]: 1006/1740 cut-off events. [2024-10-14 20:00:49,402 INFO L125 PetriNetUnfolderBase]: For 944/944 co-relation queries the response was YES. [2024-10-14 20:00:49,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4891 conditions, 1740 events. 1006/1740 cut-off events. For 944/944 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 9042 event pairs, 373 based on Foata normal form. 18/1750 useless extension candidates. Maximal degree in co-relation 4837. Up to 982 conditions per place. [2024-10-14 20:00:49,413 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 120 selfloop transitions, 8 changer transitions 0/131 dead transitions. [2024-10-14 20:00:49,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 131 transitions, 1011 flow [2024-10-14 20:00:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 20:00:49,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 20:00:49,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-10-14 20:00:49,415 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.69375 [2024-10-14 20:00:49,415 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 533 flow. Second operand 4 states and 111 transitions. [2024-10-14 20:00:49,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 131 transitions, 1011 flow [2024-10-14 20:00:49,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 131 transitions, 995 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 20:00:49,420 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 560 flow [2024-10-14 20:00:49,420 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=560, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2024-10-14 20:00:49,421 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 39 predicate places. [2024-10-14 20:00:49,421 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 560 flow [2024-10-14 20:00:49,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:49,421 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:49,421 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:49,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2024-10-14 20:00:49,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:49,622 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:00:49,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:49,622 INFO L85 PathProgramCache]: Analyzing trace with hash -437753348, now seen corresponding path program 2 times [2024-10-14 20:00:49,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:49,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566988708] [2024-10-14 20:00:49,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 20:00:49,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:49,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:49,624 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:49,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-10-14 20:00:49,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 20:00:49,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 20:00:49,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 20:00:49,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:00:49,700 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:49,700 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:49,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566988708] [2024-10-14 20:00:49,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566988708] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:49,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:49,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 20:00:49,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748602287] [2024-10-14 20:00:49,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:49,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 20:00:49,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:49,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 20:00:49,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 20:00:49,704 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-10-14 20:00:49,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 560 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:49,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:49,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-10-14 20:00:49,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:49,960 INFO L124 PetriNetUnfolderBase]: 1096/1935 cut-off events. [2024-10-14 20:00:49,960 INFO L125 PetriNetUnfolderBase]: For 1947/1947 co-relation queries the response was YES. [2024-10-14 20:00:49,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5990 conditions, 1935 events. 1096/1935 cut-off events. For 1947/1947 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10156 event pairs, 342 based on Foata normal form. 24/1959 useless extension candidates. Maximal degree in co-relation 5934. Up to 1244 conditions per place. [2024-10-14 20:00:49,971 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 108 selfloop transitions, 13 changer transitions 0/124 dead transitions. [2024-10-14 20:00:49,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 124 transitions, 1024 flow [2024-10-14 20:00:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 20:00:49,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 20:00:49,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-10-14 20:00:49,973 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-10-14 20:00:49,973 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 560 flow. Second operand 4 states and 105 transitions. [2024-10-14 20:00:49,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 124 transitions, 1024 flow [2024-10-14 20:00:49,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 124 transitions, 988 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 20:00:49,980 INFO L231 Difference]: Finished difference. Result has 83 places, 95 transitions, 705 flow [2024-10-14 20:00:49,980 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=705, PETRI_PLACES=83, PETRI_TRANSITIONS=95} [2024-10-14 20:00:49,981 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 43 predicate places. [2024-10-14 20:00:49,981 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 95 transitions, 705 flow [2024-10-14 20:00:49,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:49,981 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:49,981 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:49,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2024-10-14 20:00:50,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:50,182 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:00:50,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:50,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1698897302, now seen corresponding path program 3 times [2024-10-14 20:00:50,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:50,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924337654] [2024-10-14 20:00:50,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 20:00:50,183 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:50,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:50,184 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:50,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-10-14 20:00:50,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-10-14 20:00:50,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 20:00:50,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 20:00:50,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:50,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:00:50,261 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:50,262 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:50,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924337654] [2024-10-14 20:00:50,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924337654] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:50,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:50,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 20:00:50,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229227672] [2024-10-14 20:00:50,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:50,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 20:00:50,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:50,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 20:00:50,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 20:00:50,268 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-10-14 20:00:50,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 95 transitions, 705 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:50,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:50,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-10-14 20:00:50,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:50,505 INFO L124 PetriNetUnfolderBase]: 1057/1830 cut-off events. [2024-10-14 20:00:50,505 INFO L125 PetriNetUnfolderBase]: For 2446/2446 co-relation queries the response was YES. [2024-10-14 20:00:50,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6256 conditions, 1830 events. 1057/1830 cut-off events. For 2446/2446 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9677 event pairs, 355 based on Foata normal form. 24/1846 useless extension candidates. Maximal degree in co-relation 6199. Up to 1015 conditions per place. [2024-10-14 20:00:50,513 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 124 selfloop transitions, 23 changer transitions 0/150 dead transitions. [2024-10-14 20:00:50,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 150 transitions, 1277 flow [2024-10-14 20:00:50,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 20:00:50,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 20:00:50,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-10-14 20:00:50,514 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.70625 [2024-10-14 20:00:50,514 INFO L175 Difference]: Start difference. First operand has 83 places, 95 transitions, 705 flow. Second operand 4 states and 113 transitions. [2024-10-14 20:00:50,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 150 transitions, 1277 flow [2024-10-14 20:00:50,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 150 transitions, 1265 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-10-14 20:00:50,523 INFO L231 Difference]: Finished difference. Result has 88 places, 101 transitions, 839 flow [2024-10-14 20:00:50,524 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=839, PETRI_PLACES=88, PETRI_TRANSITIONS=101} [2024-10-14 20:00:50,524 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 48 predicate places. [2024-10-14 20:00:50,524 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 839 flow [2024-10-14 20:00:50,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:50,524 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:50,524 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:50,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2024-10-14 20:00:50,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:50,725 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:00:50,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:50,726 INFO L85 PathProgramCache]: Analyzing trace with hash 72773020, now seen corresponding path program 1 times [2024-10-14 20:00:50,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:50,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882165012] [2024-10-14 20:00:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:50,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:50,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:50,729 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:50,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-10-14 20:00:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:50,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 20:00:50,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:00:50,838 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:50,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:50,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882165012] [2024-10-14 20:00:50,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882165012] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:50,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:50,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 20:00:50,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159062623] [2024-10-14 20:00:50,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:50,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 20:00:50,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:50,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 20:00:50,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 20:00:50,843 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-10-14 20:00:50,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 101 transitions, 839 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:50,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:50,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-10-14 20:00:50,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:51,168 INFO L124 PetriNetUnfolderBase]: 1340/2272 cut-off events. [2024-10-14 20:00:51,169 INFO L125 PetriNetUnfolderBase]: For 5707/5707 co-relation queries the response was YES. [2024-10-14 20:00:51,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8573 conditions, 2272 events. 1340/2272 cut-off events. For 5707/5707 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11636 event pairs, 396 based on Foata normal form. 27/2299 useless extension candidates. Maximal degree in co-relation 8513. Up to 1383 conditions per place. [2024-10-14 20:00:51,179 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 126 selfloop transitions, 18 changer transitions 0/146 dead transitions. [2024-10-14 20:00:51,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 146 transitions, 1371 flow [2024-10-14 20:00:51,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 20:00:51,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 20:00:51,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-10-14 20:00:51,180 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-10-14 20:00:51,180 INFO L175 Difference]: Start difference. First operand has 88 places, 101 transitions, 839 flow. Second operand 4 states and 108 transitions. [2024-10-14 20:00:51,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 146 transitions, 1371 flow [2024-10-14 20:00:51,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 146 transitions, 1348 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-10-14 20:00:51,189 INFO L231 Difference]: Finished difference. Result has 92 places, 110 transitions, 964 flow [2024-10-14 20:00:51,189 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=964, PETRI_PLACES=92, PETRI_TRANSITIONS=110} [2024-10-14 20:00:51,190 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 52 predicate places. [2024-10-14 20:00:51,190 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 110 transitions, 964 flow [2024-10-14 20:00:51,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:51,190 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:51,190 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:51,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2024-10-14 20:00:51,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:51,391 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:00:51,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:51,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1502726180, now seen corresponding path program 2 times [2024-10-14 20:00:51,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:51,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023423240] [2024-10-14 20:00:51,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 20:00:51,392 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:51,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:51,393 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:51,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-10-14 20:00:51,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 20:00:51,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 20:00:51,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 20:00:51,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:51,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 20:00:51,458 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:51,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:51,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023423240] [2024-10-14 20:00:51,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023423240] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:51,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:51,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 20:00:51,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418969150] [2024-10-14 20:00:51,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:51,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 20:00:51,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:51,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 20:00:51,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 20:00:51,460 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-10-14 20:00:51,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 110 transitions, 964 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:51,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:51,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-10-14 20:00:51,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:51,689 INFO L124 PetriNetUnfolderBase]: 1202/2026 cut-off events. [2024-10-14 20:00:51,689 INFO L125 PetriNetUnfolderBase]: For 6736/6736 co-relation queries the response was YES. [2024-10-14 20:00:51,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8065 conditions, 2026 events. 1202/2026 cut-off events. For 6736/6736 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10028 event pairs, 479 based on Foata normal form. 48/2074 useless extension candidates. Maximal degree in co-relation 8003. Up to 1318 conditions per place. [2024-10-14 20:00:51,699 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 139 selfloop transitions, 19 changer transitions 1/161 dead transitions. [2024-10-14 20:00:51,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 161 transitions, 1750 flow [2024-10-14 20:00:51,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 20:00:51,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 20:00:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-10-14 20:00:51,701 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-10-14 20:00:51,701 INFO L175 Difference]: Start difference. First operand has 92 places, 110 transitions, 964 flow. Second operand 4 states and 98 transitions. [2024-10-14 20:00:51,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 161 transitions, 1750 flow [2024-10-14 20:00:51,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 161 transitions, 1727 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 20:00:51,734 INFO L231 Difference]: Finished difference. Result has 96 places, 111 transitions, 1017 flow [2024-10-14 20:00:51,734 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1017, PETRI_PLACES=96, PETRI_TRANSITIONS=111} [2024-10-14 20:00:51,734 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 56 predicate places. [2024-10-14 20:00:51,735 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 111 transitions, 1017 flow [2024-10-14 20:00:51,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:51,735 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:51,735 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:51,739 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 (18)] Forceful destruction successful, exit code 0 [2024-10-14 20:00:51,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:51,936 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:00:51,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:51,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1935282272, now seen corresponding path program 1 times [2024-10-14 20:00:51,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:51,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004727172] [2024-10-14 20:00:51,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:51,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:51,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:51,938 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:51,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2024-10-14 20:00:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:51,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 20:00:51,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:52,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 20:00:52,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 19 [2024-10-14 20:00:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:00:52,117 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:53,308 INFO L349 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2024-10-14 20:00:53,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 23 [2024-10-14 20:00:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:00:53,357 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:53,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004727172] [2024-10-14 20:00:53,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004727172] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:00:53,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:00:53,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-10-14 20:00:53,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859289337] [2024-10-14 20:00:53,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:00:53,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 20:00:53,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:53,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 20:00:53,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=35, Unknown=1, NotChecked=0, Total=56 [2024-10-14 20:00:54,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 20:00:55,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 20:00:56,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 20:00:58,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 20:00:59,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 20:01:00,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 20:01:01,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 20:01:03,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 20:01:03,147 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-10-14 20:01:03,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 111 transitions, 1017 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:01:03,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:01:03,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-10-14 20:01:03,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:01:07,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 20:01:11,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:01:15,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:01:15,588 INFO L124 PetriNetUnfolderBase]: 1572/2699 cut-off events. [2024-10-14 20:01:15,588 INFO L125 PetriNetUnfolderBase]: For 9153/9153 co-relation queries the response was YES. [2024-10-14 20:01:15,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11160 conditions, 2699 events. 1572/2699 cut-off events. For 9153/9153 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14593 event pairs, 200 based on Foata normal form. 3/2702 useless extension candidates. Maximal degree in co-relation 11096. Up to 1618 conditions per place. [2024-10-14 20:01:15,627 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 153 selfloop transitions, 32 changer transitions 3/191 dead transitions. [2024-10-14 20:01:15,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 191 transitions, 1979 flow [2024-10-14 20:01:15,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 20:01:15,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 20:01:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-10-14 20:01:15,629 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-10-14 20:01:15,629 INFO L175 Difference]: Start difference. First operand has 96 places, 111 transitions, 1017 flow. Second operand 6 states and 108 transitions. [2024-10-14 20:01:15,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 191 transitions, 1979 flow [2024-10-14 20:01:15,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 191 transitions, 1917 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 20:01:15,647 INFO L231 Difference]: Finished difference. Result has 101 places, 128 transitions, 1233 flow [2024-10-14 20:01:15,648 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1233, PETRI_PLACES=101, PETRI_TRANSITIONS=128} [2024-10-14 20:01:15,648 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 61 predicate places. [2024-10-14 20:01:15,648 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 128 transitions, 1233 flow [2024-10-14 20:01:15,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:01:15,649 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:01:15,649 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:01:15,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2024-10-14 20:01:15,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:01:15,850 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:01:15,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:01:15,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1171922934, now seen corresponding path program 2 times [2024-10-14 20:01:15,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:01:15,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40754701] [2024-10-14 20:01:15,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 20:01:15,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:01:15,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:01:15,852 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:01:15,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2024-10-14 20:01:15,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 20:01:15,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 20:01:15,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 20:01:15,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:01:16,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 20:01:16,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 19 [2024-10-14 20:01:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:01:16,034 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:01:17,237 INFO L349 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2024-10-14 20:01:17,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 23 [2024-10-14 20:01:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:01:17,285 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:01:17,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40754701] [2024-10-14 20:01:17,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40754701] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 20:01:17,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 20:01:17,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-10-14 20:01:17,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075044732] [2024-10-14 20:01:17,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:01:17,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 20:01:17,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:01:17,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 20:01:17,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=35, Unknown=1, NotChecked=0, Total=56 [2024-10-14 20:01:17,387 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-10-14 20:01:17,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 128 transitions, 1233 flow. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:01:17,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:01:17,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-10-14 20:01:17,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:01:21,469 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 [] [2024-10-14 20:01:21,772 INFO L124 PetriNetUnfolderBase]: 1660/2892 cut-off events. [2024-10-14 20:01:21,772 INFO L125 PetriNetUnfolderBase]: For 10480/10480 co-relation queries the response was YES. [2024-10-14 20:01:21,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12272 conditions, 2892 events. 1660/2892 cut-off events. For 10480/10480 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16320 event pairs, 341 based on Foata normal form. 3/2895 useless extension candidates. Maximal degree in co-relation 12206. Up to 2249 conditions per place. [2024-10-14 20:01:21,807 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 150 selfloop transitions, 24 changer transitions 2/179 dead transitions. [2024-10-14 20:01:21,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 179 transitions, 2032 flow [2024-10-14 20:01:21,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 20:01:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 20:01:21,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-10-14 20:01:21,809 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-10-14 20:01:21,809 INFO L175 Difference]: Start difference. First operand has 101 places, 128 transitions, 1233 flow. Second operand 4 states and 105 transitions. [2024-10-14 20:01:21,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 179 transitions, 2032 flow [2024-10-14 20:01:21,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 179 transitions, 1983 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-10-14 20:01:21,829 INFO L231 Difference]: Finished difference. Result has 105 places, 137 transitions, 1396 flow [2024-10-14 20:01:21,829 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1396, PETRI_PLACES=105, PETRI_TRANSITIONS=137} [2024-10-14 20:01:21,830 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 65 predicate places. [2024-10-14 20:01:21,830 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 137 transitions, 1396 flow [2024-10-14 20:01:21,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:01:21,831 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:01:21,831 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:01:21,840 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 [2024-10-14 20:01:22,032 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 [2024-10-14 20:01:22,032 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:01:22,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:01:22,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2120883119, now seen corresponding path program 1 times [2024-10-14 20:01:22,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:01:22,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352204318] [2024-10-14 20:01:22,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:01:22,033 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:01:22,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:01:22,036 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) [2024-10-14 20:01:22,039 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 [2024-10-14 20:01:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:01:22,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 20:01:22,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:01:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:01:22,151 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:01:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:01:22,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:01:22,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352204318] [2024-10-14 20:01:22,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352204318] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:01:22,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:01:22,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2024-10-14 20:01:22,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266525610] [2024-10-14 20:01:22,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:01:22,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-14 20:01:22,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:01:22,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-14 20:01:22,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-14 20:01:22,283 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-10-14 20:01:22,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 137 transitions, 1396 flow. Second operand has 11 states, 11 states have (on average 16.545454545454547) internal successors, (182), 11 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:01:22,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:01:22,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-10-14 20:01:22,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:01:23,248 INFO L124 PetriNetUnfolderBase]: 1769/3127 cut-off events. [2024-10-14 20:01:23,248 INFO L125 PetriNetUnfolderBase]: For 9760/9760 co-relation queries the response was YES. [2024-10-14 20:01:23,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13436 conditions, 3127 events. 1769/3127 cut-off events. For 9760/9760 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18454 event pairs, 567 based on Foata normal form. 27/3154 useless extension candidates. Maximal degree in co-relation 13367. Up to 1759 conditions per place. [2024-10-14 20:01:23,262 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 182 selfloop transitions, 63 changer transitions 1/248 dead transitions. [2024-10-14 20:01:23,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 248 transitions, 2550 flow [2024-10-14 20:01:23,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 20:01:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-14 20:01:23,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 274 transitions. [2024-10-14 20:01:23,264 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5269230769230769 [2024-10-14 20:01:23,264 INFO L175 Difference]: Start difference. First operand has 105 places, 137 transitions, 1396 flow. Second operand 13 states and 274 transitions. [2024-10-14 20:01:23,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 248 transitions, 2550 flow [2024-10-14 20:01:23,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 248 transitions, 2520 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-14 20:01:23,283 INFO L231 Difference]: Finished difference. Result has 125 places, 172 transitions, 1889 flow [2024-10-14 20:01:23,284 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1889, PETRI_PLACES=125, PETRI_TRANSITIONS=172} [2024-10-14 20:01:23,284 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 85 predicate places. [2024-10-14 20:01:23,284 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 172 transitions, 1889 flow [2024-10-14 20:01:23,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.545454545454547) internal successors, (182), 11 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:01:23,285 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:01:23,285 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:01:23,291 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 [2024-10-14 20:01:23,485 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 [2024-10-14 20:01:23,485 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:01:23,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:01:23,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1568134109, now seen corresponding path program 2 times [2024-10-14 20:01:23,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:01:23,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106885126] [2024-10-14 20:01:23,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 20:01:23,486 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:01:23,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:01:23,487 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) [2024-10-14 20:01:23,488 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 [2024-10-14 20:01:23,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 20:01:23,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 20:01:23,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 20:01:23,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:01:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:01:23,609 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:01:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:01:23,680 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:01:23,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106885126] [2024-10-14 20:01:23,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106885126] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:01:23,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:01:23,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2024-10-14 20:01:23,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908506996] [2024-10-14 20:01:23,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:01:23,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 20:01:23,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:01:23,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 20:01:23,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-14 20:01:23,697 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-10-14 20:01:23,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 172 transitions, 1889 flow. Second operand has 13 states, 13 states have (on average 16.23076923076923) internal successors, (211), 13 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:01:23,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:01:23,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-10-14 20:01:23,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:01:25,536 INFO L124 PetriNetUnfolderBase]: 3419/6091 cut-off events. [2024-10-14 20:01:25,536 INFO L125 PetriNetUnfolderBase]: For 31929/31929 co-relation queries the response was YES. [2024-10-14 20:01:25,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28894 conditions, 6091 events. 3419/6091 cut-off events. For 31929/31929 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 39283 event pairs, 197 based on Foata normal form. 54/6145 useless extension candidates. Maximal degree in co-relation 28817. Up to 1092 conditions per place. [2024-10-14 20:01:25,578 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 340 selfloop transitions, 399 changer transitions 1/742 dead transitions. [2024-10-14 20:01:25,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 742 transitions, 8961 flow [2024-10-14 20:01:25,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-14 20:01:25,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-10-14 20:01:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 708 transitions. [2024-10-14 20:01:25,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-10-14 20:01:25,582 INFO L175 Difference]: Start difference. First operand has 125 places, 172 transitions, 1889 flow. Second operand 33 states and 708 transitions. [2024-10-14 20:01:25,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 742 transitions, 8961 flow [2024-10-14 20:01:25,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 742 transitions, 8786 flow, removed 30 selfloop flow, removed 1 redundant places. [2024-10-14 20:01:25,666 INFO L231 Difference]: Finished difference. Result has 172 places, 516 transitions, 7135 flow [2024-10-14 20:01:25,666 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7135, PETRI_PLACES=172, PETRI_TRANSITIONS=516} [2024-10-14 20:01:25,666 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 132 predicate places. [2024-10-14 20:01:25,667 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 516 transitions, 7135 flow [2024-10-14 20:01:25,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.23076923076923) internal successors, (211), 13 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:01:25,667 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:01:25,667 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:01:25,673 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 [2024-10-14 20:01:25,868 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 [2024-10-14 20:01:25,868 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:01:25,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:01:25,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1444729847, now seen corresponding path program 3 times [2024-10-14 20:01:25,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:01:25,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300913171] [2024-10-14 20:01:25,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 20:01:25,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:01:25,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:01:25,871 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) [2024-10-14 20:01:25,872 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 [2024-10-14 20:01:25,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-14 20:01:25,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 20:01:25,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 20:01:25,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:01:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:01:26,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:01:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:01:26,221 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:01:26,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300913171] [2024-10-14 20:01:26,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300913171] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:01:26,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:01:26,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2024-10-14 20:01:26,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068614291] [2024-10-14 20:01:26,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:01:26,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 20:01:26,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:01:26,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 20:01:26,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-10-14 20:01:26,226 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-10-14 20:01:26,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 516 transitions, 7135 flow. Second operand has 12 states, 12 states have (on average 16.333333333333332) internal successors, (196), 12 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:01:26,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:01:26,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-10-14 20:01:26,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:01:29,117 INFO L124 PetriNetUnfolderBase]: 4442/7921 cut-off events. [2024-10-14 20:01:29,118 INFO L125 PetriNetUnfolderBase]: For 65507/65507 co-relation queries the response was YES. [2024-10-14 20:01:29,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46202 conditions, 7921 events. 4442/7921 cut-off events. For 65507/65507 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 54223 event pairs, 702 based on Foata normal form. 39/7960 useless extension candidates. Maximal degree in co-relation 46109. Up to 2470 conditions per place. [2024-10-14 20:01:29,173 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 507 selfloop transitions, 554 changer transitions 4/1067 dead transitions. [2024-10-14 20:01:29,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 1067 transitions, 16224 flow [2024-10-14 20:01:29,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-14 20:01:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-14 20:01:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 588 transitions. [2024-10-14 20:01:29,175 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-10-14 20:01:29,176 INFO L175 Difference]: Start difference. First operand has 172 places, 516 transitions, 7135 flow. Second operand 28 states and 588 transitions. [2024-10-14 20:01:29,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 1067 transitions, 16224 flow [2024-10-14 20:01:29,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 1067 transitions, 13965 flow, removed 931 selfloop flow, removed 5 redundant places. [2024-10-14 20:01:29,431 INFO L231 Difference]: Finished difference. Result has 208 places, 848 transitions, 12262 flow [2024-10-14 20:01:29,431 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6162, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12262, PETRI_PLACES=208, PETRI_TRANSITIONS=848} [2024-10-14 20:01:29,431 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 168 predicate places. [2024-10-14 20:01:29,431 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 848 transitions, 12262 flow [2024-10-14 20:01:29,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.333333333333332) internal successors, (196), 12 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:01:29,432 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:01:29,432 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:01:29,435 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 [2024-10-14 20:01:29,632 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 [2024-10-14 20:01:29,632 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-14 20:01:29,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:01:29,633 INFO L85 PathProgramCache]: Analyzing trace with hash 763666211, now seen corresponding path program 4 times [2024-10-14 20:01:29,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:01:29,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593450918] [2024-10-14 20:01:29,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 20:01:29,633 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:01:29,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:01:29,634 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) [2024-10-14 20:01:29,635 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 [2024-10-14 20:01:29,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 20:01:29,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 20:01:29,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-14 20:01:29,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:01:29,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2024-10-14 20:01:30,035 INFO L349 Elim1Store]: treesize reduction 164, result has 7.3 percent of original size [2024-10-14 20:01:30,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 194 treesize of output 98 [2024-10-14 20:01:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:01:30,124 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:01:34,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1223 treesize of output 1167