./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:59:28,716 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:59:28,860 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:59:28,864 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:59:28,865 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:59:28,888 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:59:28,889 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:59:28,890 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:59:28,891 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:59:28,891 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:59:28,892 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:59:28,893 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:59:28,893 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:59:28,894 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:59:28,895 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:59:28,895 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:59:28,896 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:59:28,896 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:59:28,897 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:59:28,897 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:59:28,898 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:59:28,898 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:59:28,899 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:59:28,899 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:59:28,900 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:59:28,900 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:59:28,901 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:59:28,901 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:59:28,901 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:59:28,902 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:59:28,902 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:59:28,903 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:59:28,903 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:59:28,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:59:28,904 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:59:28,904 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:59:28,904 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:59:28,905 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:59:28,905 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 [2023-11-06 22:59:29,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:59:29,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:59:29,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:59:29,197 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:59:29,198 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:59:29,199 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2023-11-06 22:59:32,183 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:59:32,508 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:59:32,508 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2023-11-06 22:59:32,518 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/data/6dc7ec403/19c3cad0669f4c419c6275cfa2189f42/FLAGd5570fcdf [2023-11-06 22:59:32,540 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/data/6dc7ec403/19c3cad0669f4c419c6275cfa2189f42 [2023-11-06 22:59:32,549 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:59:32,552 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:59:32,556 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:59:32,557 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:59:32,562 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:59:32,563 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:59:32" (1/1) ... [2023-11-06 22:59:32,564 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@520d28eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:32, skipping insertion in model container [2023-11-06 22:59:32,564 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:59:32" (1/1) ... [2023-11-06 22:59:32,599 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:59:32,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:59:32,925 ERROR L324 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) [2023-11-06 22:59:32,926 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7774f35a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:32, skipping insertion in model container [2023-11-06 22:59:32,926 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:59:32,927 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 22:59:32,930 INFO L158 Benchmark]: Toolchain (without parser) took 375.64ms. Allocated memory is still 182.5MB. Free memory was 151.8MB in the beginning and 152.0MB in the end (delta: -240.9kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:59:32,931 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 121.6MB. Free memory is still 91.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:59:32,932 INFO L158 Benchmark]: CACSL2BoogieTranslator took 370.52ms. Allocated memory is still 182.5MB. Free memory was 151.5MB in the beginning and 152.0MB in the end (delta: -473.3kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:59:32,934 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 121.6MB. Free memory is still 91.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 370.52ms. Allocated memory is still 182.5MB. Free memory was 151.5MB in the beginning and 152.0MB in the end (delta: -473.3kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 97]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:59:35,451 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:59:35,527 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 22:59:35,533 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:59:35,533 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:59:35,577 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:59:35,578 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:59:35,578 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:59:35,579 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:59:35,580 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:59:35,581 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:59:35,582 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:59:35,582 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:59:35,583 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:59:35,584 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:59:35,584 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:59:35,585 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:59:35,585 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:59:35,586 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:59:35,586 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:59:35,587 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:59:35,595 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:59:35,595 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:59:35,596 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 22:59:35,596 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 22:59:35,597 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:59:35,597 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:59:35,597 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:59:35,598 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:59:35,599 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:59:35,600 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:59:35,600 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:59:35,601 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:59:35,601 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:59:35,602 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 22:59:35,602 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 22:59:35,602 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:59:35,602 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:59:35,603 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:59:35,604 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 22:59:35,604 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:59:35,605 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 [2023-11-06 22:59:36,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:59:36,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:59:36,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:59:36,037 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:59:36,039 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:59:36,040 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2023-11-06 22:59:39,288 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:59:39,539 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:59:39,542 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2023-11-06 22:59:39,556 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/data/e5aece26f/f26f597f4fae4a46a4bf4b87d430c2ec/FLAG9293cb8f4 [2023-11-06 22:59:39,578 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/data/e5aece26f/f26f597f4fae4a46a4bf4b87d430c2ec [2023-11-06 22:59:39,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:59:39,587 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:59:39,592 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:59:39,592 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:59:39,598 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:59:39,601 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:59:39" (1/1) ... [2023-11-06 22:59:39,603 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e04d4f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:39, skipping insertion in model container [2023-11-06 22:59:39,603 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:59:39" (1/1) ... [2023-11-06 22:59:39,636 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:59:39,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:59:39,929 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 22:59:39,939 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:59:39,976 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:59:39,984 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:59:40,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:59:40,048 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:59:40,051 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:59:40,059 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:59:40,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:40 WrapperNode [2023-11-06 22:59:40,059 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:59:40,061 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:59:40,061 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:59:40,061 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:59:40,069 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:40" (1/1) ... [2023-11-06 22:59:40,098 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:40" (1/1) ... [2023-11-06 22:59:40,143 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 198 [2023-11-06 22:59:40,144 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:59:40,145 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:59:40,145 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:59:40,145 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:59:40,158 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:40" (1/1) ... [2023-11-06 22:59:40,158 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:40" (1/1) ... [2023-11-06 22:59:40,175 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:40" (1/1) ... [2023-11-06 22:59:40,175 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:40" (1/1) ... [2023-11-06 22:59:40,185 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:40" (1/1) ... [2023-11-06 22:59:40,203 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:40" (1/1) ... [2023-11-06 22:59:40,205 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:40" (1/1) ... [2023-11-06 22:59:40,211 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:40" (1/1) ... [2023-11-06 22:59:40,215 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:59:40,216 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:59:40,216 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:59:40,216 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:59:40,217 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:40" (1/1) ... [2023-11-06 22:59:40,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:59:40,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:40,278 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:59:40,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:59:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:59:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 22:59:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:59:40,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 22:59:40,324 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:59:40,324 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:59:40,324 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:59:40,325 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:59:40,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:59:40,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:59:40,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:59:40,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:59:40,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:59:40,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:59:40,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 22:59:40,330 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:59:40,449 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:59:40,451 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:59:41,368 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:59:41,811 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:59:41,812 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:59:41,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:59:41 BoogieIcfgContainer [2023-11-06 22:59:41,815 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:59:41,818 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:59:41,818 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:59:41,822 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:59:41,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:59:39" (1/3) ... [2023-11-06 22:59:41,823 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58afc17a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:59:41, skipping insertion in model container [2023-11-06 22:59:41,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:40" (2/3) ... [2023-11-06 22:59:41,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58afc17a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:59:41, skipping insertion in model container [2023-11-06 22:59:41,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:59:41" (3/3) ... [2023-11-06 22:59:41,828 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2023-11-06 22:59:41,848 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:59:41,849 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-11-06 22:59:41,849 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:59:42,020 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:59:42,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 204 transitions, 422 flow [2023-11-06 22:59:42,234 INFO L124 PetriNetUnfolderBase]: 13/202 cut-off events. [2023-11-06 22:59:42,235 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:59:42,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 202 events. 13/202 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 264 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 146. Up to 2 conditions per place. [2023-11-06 22:59:42,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 204 transitions, 422 flow [2023-11-06 22:59:42,256 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 197 transitions, 406 flow [2023-11-06 22:59:42,260 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:59:42,274 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 197 transitions, 406 flow [2023-11-06 22:59:42,277 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 197 transitions, 406 flow [2023-11-06 22:59:42,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 197 transitions, 406 flow [2023-11-06 22:59:42,327 INFO L124 PetriNetUnfolderBase]: 13/197 cut-off events. [2023-11-06 22:59:42,327 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:59:42,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 197 events. 13/197 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 271 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 146. Up to 2 conditions per place. [2023-11-06 22:59:42,331 INFO L119 LiptonReduction]: Number of co-enabled transitions 1848 [2023-11-06 23:00:13,992 INFO L134 LiptonReduction]: Checked pairs total: 2389 [2023-11-06 23:00:13,993 INFO L136 LiptonReduction]: Total number of compositions: 219 [2023-11-06 23:00:14,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:00:14,060 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@301e479f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:00:14,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2023-11-06 23:00:14,086 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:00:14,087 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 23:00:14,087 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:00:14,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:14,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:00:14,088 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:00:14,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:14,101 INFO L85 PathProgramCache]: Analyzing trace with hash 31509, now seen corresponding path program 1 times [2023-11-06 23:00:14,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:14,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488486012] [2023-11-06 23:00:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:14,132 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 [2023-11-06 23:00:14,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:14,139 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:00:14,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:14,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:00:14,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:14,390 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:00:14,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,410 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:00:14,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,448 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:00:14,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,465 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:00:14,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,479 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:00:14,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,492 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:00:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:14,519 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:14,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:14,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488486012] [2023-11-06 23:00:14,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488486012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:14,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:14,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:00:14,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767496193] [2023-11-06 23:00:14,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:14,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:00:14,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:14,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:00:14,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:00:14,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 423 [2023-11-06 23:00:14,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 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) [2023-11-06 23:00:14,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:14,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 423 [2023-11-06 23:00:14,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:15,484 INFO L124 PetriNetUnfolderBase]: 664/931 cut-off events. [2023-11-06 23:00:15,485 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-06 23:00:15,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1883 conditions, 931 events. 664/931 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 4038 event pairs, 309 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 1673. Up to 920 conditions per place. [2023-11-06 23:00:15,498 INFO L140 encePairwiseOnDemand]: 401/423 looper letters, 38 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2023-11-06 23:00:15,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 47 transitions, 196 flow [2023-11-06 23:00:15,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:15,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:15,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-11-06 23:00:15,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41134751773049644 [2023-11-06 23:00:15,523 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-11-06 23:00:15,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-11-06 23:00:15,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:15,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-11-06 23:00:15,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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) [2023-11-06 23:00:15,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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) [2023-11-06 23:00:15,548 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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) [2023-11-06 23:00:15,551 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 116 flow. Second operand 3 states and 522 transitions. [2023-11-06 23:00:15,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 47 transitions, 196 flow [2023-11-06 23:00:15,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 47 transitions, 188 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 23:00:15,560 INFO L231 Difference]: Finished difference. Result has 42 places, 45 transitions, 138 flow [2023-11-06 23:00:15,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=42, PETRI_TRANSITIONS=45} [2023-11-06 23:00:15,567 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2023-11-06 23:00:15,567 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 45 transitions, 138 flow [2023-11-06 23:00:15,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 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) [2023-11-06 23:00:15,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:15,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:00:15,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:15,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:00:15,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:00:15,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:15,785 INFO L85 PathProgramCache]: Analyzing trace with hash 31508, now seen corresponding path program 1 times [2023-11-06 23:00:15,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:15,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459323981] [2023-11-06 23:00:15,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:15,786 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 [2023-11-06 23:00:15,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:15,787 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:00:15,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:15,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:00:15,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:15,893 INFO L351 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 [2023-11-06 23:00:15,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:15,907 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:00:15,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:15,915 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:00:15,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:15,924 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:00:15,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:15,936 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:00:15,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:15,961 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:00:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:15,965 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:15,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:15,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459323981] [2023-11-06 23:00:15,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459323981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:15,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:15,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:00:15,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721033227] [2023-11-06 23:00:15,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:15,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:00:15,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:15,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:00:15,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:00:16,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 423 [2023-11-06 23:00:16,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 45 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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) [2023-11-06 23:00:16,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:16,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 423 [2023-11-06 23:00:16,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:16,513 INFO L124 PetriNetUnfolderBase]: 664/927 cut-off events. [2023-11-06 23:00:16,513 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 23:00:16,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1881 conditions, 927 events. 664/927 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 4025 event pairs, 309 based on Foata normal form. 4/190 useless extension candidates. Maximal degree in co-relation 1825. Up to 912 conditions per place. [2023-11-06 23:00:16,522 INFO L140 encePairwiseOnDemand]: 417/423 looper letters, 34 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2023-11-06 23:00:16,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 43 transitions, 216 flow [2023-11-06 23:00:16,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:16,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 505 transitions. [2023-11-06 23:00:16,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979511426319937 [2023-11-06 23:00:16,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 505 transitions. [2023-11-06 23:00:16,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 505 transitions. [2023-11-06 23:00:16,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:16,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 505 transitions. [2023-11-06 23:00:16,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 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) [2023-11-06 23:00:16,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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) [2023-11-06 23:00:16,544 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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) [2023-11-06 23:00:16,545 INFO L175 Difference]: Start difference. First operand has 42 places, 45 transitions, 138 flow. Second operand 3 states and 505 transitions. [2023-11-06 23:00:16,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 43 transitions, 216 flow [2023-11-06 23:00:16,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:00:16,548 INFO L231 Difference]: Finished difference. Result has 40 places, 43 transitions, 134 flow [2023-11-06 23:00:16,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=40, PETRI_TRANSITIONS=43} [2023-11-06 23:00:16,549 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-11-06 23:00:16,549 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 43 transitions, 134 flow [2023-11-06 23:00:16,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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) [2023-11-06 23:00:16,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:16,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 23:00:16,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:16,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:00:16,762 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:00:16,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:16,762 INFO L85 PathProgramCache]: Analyzing trace with hash 30380118, now seen corresponding path program 1 times [2023-11-06 23:00:16,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:16,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437343822] [2023-11-06 23:00:16,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:16,763 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 [2023-11-06 23:00:16,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:16,765 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:00:16,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:16,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:00:16,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:16,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:16,959 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 23:00:16,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:16,975 INFO L351 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 5 treesize of output 3 [2023-11-06 23:00:17,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:17,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:17,011 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 23:00:17,024 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 23:00:17,116 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:00:17,117 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 23:00:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:17,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:17,700 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:17,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437343822] [2023-11-06 23:00:17,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437343822] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:17,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:00:17,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-06 23:00:17,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550688412] [2023-11-06 23:00:17,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:17,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:00:17,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:17,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:00:17,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:00:20,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 23:00:23,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 23:00:26,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 23:00:26,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 423 [2023-11-06 23:00:26,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 43 transitions, 134 flow. Second operand has 8 states, 8 states have (on average 141.0) internal successors, (1128), 8 states have internal predecessors, (1128), 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) [2023-11-06 23:00:26,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:26,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 423 [2023-11-06 23:00:26,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:28,232 INFO L124 PetriNetUnfolderBase]: 984/1410 cut-off events. [2023-11-06 23:00:28,232 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:00:28,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2854 conditions, 1410 events. 984/1410 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 6799 event pairs, 460 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 1403. Up to 700 conditions per place. [2023-11-06 23:00:28,244 INFO L140 encePairwiseOnDemand]: 415/423 looper letters, 58 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2023-11-06 23:00:28,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 73 transitions, 354 flow [2023-11-06 23:00:28,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:00:28,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:00:28,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1195 transitions. [2023-11-06 23:00:28,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3531323877068558 [2023-11-06 23:00:28,251 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1195 transitions. [2023-11-06 23:00:28,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1195 transitions. [2023-11-06 23:00:28,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:28,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1195 transitions. [2023-11-06 23:00:28,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 149.375) internal successors, (1195), 8 states have internal predecessors, (1195), 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) [2023-11-06 23:00:28,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 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) [2023-11-06 23:00:28,291 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 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) [2023-11-06 23:00:28,292 INFO L175 Difference]: Start difference. First operand has 40 places, 43 transitions, 134 flow. Second operand 8 states and 1195 transitions. [2023-11-06 23:00:28,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 73 transitions, 354 flow [2023-11-06 23:00:28,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 73 transitions, 338 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:00:28,297 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 175 flow [2023-11-06 23:00:28,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=175, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-11-06 23:00:28,299 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -9 predicate places. [2023-11-06 23:00:28,299 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 175 flow [2023-11-06 23:00:28,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 141.0) internal successors, (1128), 8 states have internal predecessors, (1128), 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) [2023-11-06 23:00:28,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:28,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:00:28,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:28,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:00:28,513 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:00:28,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:28,513 INFO L85 PathProgramCache]: Analyzing trace with hash 979966, now seen corresponding path program 1 times [2023-11-06 23:00:28,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:28,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980235334] [2023-11-06 23:00:28,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:28,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:00:28,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:28,517 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:00:28,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:28,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:00:28,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:28,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:28,672 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 23:00:28,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:28,692 INFO L351 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 5 treesize of output 3 [2023-11-06 23:00:28,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:28,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:28,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:28,740 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:00:28,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:28,788 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 23:00:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:28,827 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:28,827 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:28,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980235334] [2023-11-06 23:00:28,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980235334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:28,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:28,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:00:28,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514487416] [2023-11-06 23:00:28,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:28,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:00:28,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:28,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:00:28,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:00:29,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 423 [2023-11-06 23:00:29,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 175 flow. Second operand has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 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) [2023-11-06 23:00:29,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:29,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 423 [2023-11-06 23:00:29,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:29,568 INFO L124 PetriNetUnfolderBase]: 997/1422 cut-off events. [2023-11-06 23:00:29,568 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:00:29,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2893 conditions, 1422 events. 997/1422 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 6886 event pairs, 462 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 2859. Up to 1408 conditions per place. [2023-11-06 23:00:29,579 INFO L140 encePairwiseOnDemand]: 421/423 looper letters, 42 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-06 23:00:29,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 255 flow [2023-11-06 23:00:29,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:29,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:29,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 514 transitions. [2023-11-06 23:00:29,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40504334121355395 [2023-11-06 23:00:29,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 514 transitions. [2023-11-06 23:00:29,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 514 transitions. [2023-11-06 23:00:29,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:29,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 514 transitions. [2023-11-06 23:00:29,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 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) [2023-11-06 23:00:29,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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) [2023-11-06 23:00:29,591 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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) [2023-11-06 23:00:29,591 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 175 flow. Second operand 3 states and 514 transitions. [2023-11-06 23:00:29,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 255 flow [2023-11-06 23:00:29,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 240 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-06 23:00:29,594 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 156 flow [2023-11-06 23:00:29,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-11-06 23:00:29,596 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2023-11-06 23:00:29,596 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 156 flow [2023-11-06 23:00:29,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 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) [2023-11-06 23:00:29,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:29,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:00:29,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:29,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:00:29,807 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:00:29,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:29,808 INFO L85 PathProgramCache]: Analyzing trace with hash 979964, now seen corresponding path program 1 times [2023-11-06 23:00:29,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:29,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570805012] [2023-11-06 23:00:29,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:29,809 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 [2023-11-06 23:00:29,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:29,810 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:00:29,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:29,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:00:29,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:29,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:29,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:29,949 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-11-06 23:00:29,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:29,998 INFO L322 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-06 23:00:29,998 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-06 23:00:30,051 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:00:30,052 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 23:00:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:30,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:30,065 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:30,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570805012] [2023-11-06 23:00:30,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570805012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:30,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:30,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:00:30,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752080957] [2023-11-06 23:00:30,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:30,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:00:30,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:30,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:00:30,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:00:30,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 423 [2023-11-06 23:00:30,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 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) [2023-11-06 23:00:30,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:30,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 423 [2023-11-06 23:00:30,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:30,630 INFO L124 PetriNetUnfolderBase]: 673/997 cut-off events. [2023-11-06 23:00:30,630 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:00:30,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2031 conditions, 997 events. 673/997 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 4757 event pairs, 306 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 2021. Up to 983 conditions per place. [2023-11-06 23:00:30,638 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 38 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-06 23:00:30,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 215 flow [2023-11-06 23:00:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:30,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:30,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-11-06 23:00:30,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40425531914893614 [2023-11-06 23:00:30,642 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-11-06 23:00:30,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-11-06 23:00:30,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:30,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-11-06 23:00:30,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 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) [2023-11-06 23:00:30,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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) [2023-11-06 23:00:30,649 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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) [2023-11-06 23:00:30,649 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 156 flow. Second operand 3 states and 513 transitions. [2023-11-06 23:00:30,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 215 flow [2023-11-06 23:00:30,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:30,652 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 138 flow [2023-11-06 23:00:30,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-11-06 23:00:30,653 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -11 predicate places. [2023-11-06 23:00:30,653 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 138 flow [2023-11-06 23:00:30,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 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) [2023-11-06 23:00:30,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:30,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:00:30,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:30,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:00:30,865 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:00:30,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:30,866 INFO L85 PathProgramCache]: Analyzing trace with hash 978900, now seen corresponding path program 1 times [2023-11-06 23:00:30,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:30,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038896283] [2023-11-06 23:00:30,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:30,867 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 [2023-11-06 23:00:30,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:30,870 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:00:30,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:30,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:00:30,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:30,991 INFO L351 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 [2023-11-06 23:00:31,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:31,006 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:00:31,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:31,015 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:00:31,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:31,026 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:00:31,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:31,041 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:00:31,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:31,061 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:00:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:31,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:31,384 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:31,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038896283] [2023-11-06 23:00:31,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038896283] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:31,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:00:31,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 23:00:31,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348453068] [2023-11-06 23:00:31,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:31,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:00:31,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:31,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:00:31,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:00:32,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 423 [2023-11-06 23:00:32,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 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) [2023-11-06 23:00:32,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:32,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 423 [2023-11-06 23:00:32,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:34,266 INFO L124 PetriNetUnfolderBase]: 677/1003 cut-off events. [2023-11-06 23:00:34,266 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:00:34,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2056 conditions, 1003 events. 677/1003 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 4827 event pairs, 306 based on Foata normal form. 6/294 useless extension candidates. Maximal degree in co-relation 2045. Up to 978 conditions per place. [2023-11-06 23:00:34,273 INFO L140 encePairwiseOnDemand]: 416/423 looper letters, 30 selfloop transitions, 17 changer transitions 0/49 dead transitions. [2023-11-06 23:00:34,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 49 transitions, 278 flow [2023-11-06 23:00:34,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:00:34,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:00:34,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 917 transitions. [2023-11-06 23:00:34,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3613081166272656 [2023-11-06 23:00:34,280 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 917 transitions. [2023-11-06 23:00:34,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 917 transitions. [2023-11-06 23:00:34,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:34,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 917 transitions. [2023-11-06 23:00:34,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 152.83333333333334) internal successors, (917), 6 states have internal predecessors, (917), 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) [2023-11-06 23:00:34,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 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) [2023-11-06 23:00:34,291 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 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) [2023-11-06 23:00:34,292 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 138 flow. Second operand 6 states and 917 transitions. [2023-11-06 23:00:34,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 49 transitions, 278 flow [2023-11-06 23:00:34,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 49 transitions, 267 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:34,295 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 243 flow [2023-11-06 23:00:34,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2023-11-06 23:00:34,296 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -4 predicate places. [2023-11-06 23:00:34,296 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 243 flow [2023-11-06 23:00:34,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 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) [2023-11-06 23:00:34,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:34,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:00:34,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:34,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:00:34,513 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:00:34,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:34,514 INFO L85 PathProgramCache]: Analyzing trace with hash 941770034, now seen corresponding path program 1 times [2023-11-06 23:00:34,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:34,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190618227] [2023-11-06 23:00:34,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:34,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:00:34,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:34,515 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:00:34,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:34,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:00:34,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:34,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:34,664 INFO L322 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-06 23:00:34,664 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-06 23:00:34,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:34,683 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:00:34,683 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 23:00:34,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:34,700 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:00:34,701 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 23:00:34,723 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:00:34,724 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 23:00:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:34,741 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:34,741 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:34,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190618227] [2023-11-06 23:00:34,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190618227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:34,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:34,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:00:34,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071775384] [2023-11-06 23:00:34,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:34,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:00:34,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:34,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:00:34,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:00:34,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 423 [2023-11-06 23:00:34,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 243 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 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) [2023-11-06 23:00:34,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:34,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 423 [2023-11-06 23:00:34,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:35,215 INFO L124 PetriNetUnfolderBase]: 631/929 cut-off events. [2023-11-06 23:00:35,215 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-06 23:00:35,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1944 conditions, 929 events. 631/929 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 4332 event pairs, 284 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 1929. Up to 915 conditions per place. [2023-11-06 23:00:35,222 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 44 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-11-06 23:00:35,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 329 flow [2023-11-06 23:00:35,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:35,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:35,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 505 transitions. [2023-11-06 23:00:35,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979511426319937 [2023-11-06 23:00:35,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 505 transitions. [2023-11-06 23:00:35,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 505 transitions. [2023-11-06 23:00:35,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:35,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 505 transitions. [2023-11-06 23:00:35,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 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) [2023-11-06 23:00:35,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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) [2023-11-06 23:00:35,231 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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) [2023-11-06 23:00:35,232 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 243 flow. Second operand 3 states and 505 transitions. [2023-11-06 23:00:35,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 329 flow [2023-11-06 23:00:35,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 279 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-11-06 23:00:35,236 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 191 flow [2023-11-06 23:00:35,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2023-11-06 23:00:35,237 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -8 predicate places. [2023-11-06 23:00:35,237 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 191 flow [2023-11-06 23:00:35,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 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) [2023-11-06 23:00:35,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:35,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:00:35,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:35,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:00:35,443 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:00:35,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:35,444 INFO L85 PathProgramCache]: Analyzing trace with hash 941770035, now seen corresponding path program 1 times [2023-11-06 23:00:35,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:35,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063009997] [2023-11-06 23:00:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:35,444 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 [2023-11-06 23:00:35,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:35,445 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:00:35,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:35,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:00:35,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:35,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:35,589 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 23:00:35,595 INFO L351 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 10 treesize of output 8 [2023-11-06 23:00:35,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:35,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:35,619 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:00:35,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:35,628 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:00:35,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:35,665 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 23:00:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:35,736 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:35,736 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:35,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063009997] [2023-11-06 23:00:35,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063009997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:35,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:35,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:00:35,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564467841] [2023-11-06 23:00:35,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:35,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:00:35,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:35,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:00:35,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:00:35,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 423 [2023-11-06 23:00:35,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 191 flow. Second operand has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 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) [2023-11-06 23:00:35,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:35,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 423 [2023-11-06 23:00:35,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:36,372 INFO L124 PetriNetUnfolderBase]: 585/855 cut-off events. [2023-11-06 23:00:36,372 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-06 23:00:36,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1770 conditions, 855 events. 585/855 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 3891 event pairs, 262 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 1756. Up to 841 conditions per place. [2023-11-06 23:00:36,379 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 42 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-06 23:00:36,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 273 flow [2023-11-06 23:00:36,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:36,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:36,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-11-06 23:00:36,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3963750985027581 [2023-11-06 23:00:36,384 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-11-06 23:00:36,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-11-06 23:00:36,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:36,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-11-06 23:00:36,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 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) [2023-11-06 23:00:36,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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) [2023-11-06 23:00:36,390 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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) [2023-11-06 23:00:36,390 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 191 flow. Second operand 3 states and 503 transitions. [2023-11-06 23:00:36,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 273 flow [2023-11-06 23:00:36,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:36,395 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 188 flow [2023-11-06 23:00:36,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2023-11-06 23:00:36,399 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -9 predicate places. [2023-11-06 23:00:36,399 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 188 flow [2023-11-06 23:00:36,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 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) [2023-11-06 23:00:36,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:36,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:00:36,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:36,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:00:36,621 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:00:36,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:36,621 INFO L85 PathProgramCache]: Analyzing trace with hash -869906166, now seen corresponding path program 1 times [2023-11-06 23:00:36,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:36,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944645187] [2023-11-06 23:00:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:36,622 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 [2023-11-06 23:00:36,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:36,623 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:00:36,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:36,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:00:36,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:36,811 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:36,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:36,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944645187] [2023-11-06 23:00:36,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944645187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:36,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:36,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:00:36,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503786427] [2023-11-06 23:00:36,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:36,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:00:36,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:36,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:00:36,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:00:36,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 423 [2023-11-06 23:00:36,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 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) [2023-11-06 23:00:36,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:36,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 423 [2023-11-06 23:00:36,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:37,491 INFO L124 PetriNetUnfolderBase]: 606/948 cut-off events. [2023-11-06 23:00:37,491 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-06 23:00:37,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1980 conditions, 948 events. 606/948 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 4724 event pairs, 302 based on Foata normal form. 2/376 useless extension candidates. Maximal degree in co-relation 1965. Up to 814 conditions per place. [2023-11-06 23:00:37,501 INFO L140 encePairwiseOnDemand]: 411/423 looper letters, 60 selfloop transitions, 3 changer transitions 2/67 dead transitions. [2023-11-06 23:00:37,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 67 transitions, 408 flow [2023-11-06 23:00:37,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:00:37,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:00:37,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 668 transitions. [2023-11-06 23:00:37,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3947990543735225 [2023-11-06 23:00:37,505 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 668 transitions. [2023-11-06 23:00:37,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 668 transitions. [2023-11-06 23:00:37,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:37,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 668 transitions. [2023-11-06 23:00:37,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 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) [2023-11-06 23:00:37,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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) [2023-11-06 23:00:37,513 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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) [2023-11-06 23:00:37,513 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 188 flow. Second operand 4 states and 668 transitions. [2023-11-06 23:00:37,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 67 transitions, 408 flow [2023-11-06 23:00:37,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 67 transitions, 407 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:37,519 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 212 flow [2023-11-06 23:00:37,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-11-06 23:00:37,520 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -6 predicate places. [2023-11-06 23:00:37,521 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 212 flow [2023-11-06 23:00:37,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 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) [2023-11-06 23:00:37,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:37,522 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 23:00:37,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:37,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:00:37,733 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:00:37,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:37,733 INFO L85 PathProgramCache]: Analyzing trace with hash -900255019, now seen corresponding path program 2 times [2023-11-06 23:00:37,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:37,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952548325] [2023-11-06 23:00:37,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:00:37,734 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 [2023-11-06 23:00:37,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:37,735 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:00:37,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:37,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:00:37,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:37,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:00:37,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:37,865 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:00:37,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:37,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:00:37,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:37,899 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:00:37,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:37,914 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:00:37,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:37,932 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:00:37,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:37,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:00:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:38,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:38,870 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:38,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952548325] [2023-11-06 23:00:38,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952548325] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:38,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:00:38,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 23:00:38,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966001577] [2023-11-06 23:00:38,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:38,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:00:38,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:38,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:00:38,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:00:42,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 423 [2023-11-06 23:00:42,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 212 flow. Second operand has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 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) [2023-11-06 23:00:42,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:42,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 423 [2023-11-06 23:00:42,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:46,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:00:47,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:00:49,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:00:51,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:00:53,185 INFO L124 PetriNetUnfolderBase]: 644/1000 cut-off events. [2023-11-06 23:00:53,185 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-11-06 23:00:53,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2598 conditions, 1000 events. 644/1000 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 5065 event pairs, 304 based on Foata normal form. 14/496 useless extension candidates. Maximal degree in co-relation 2581. Up to 946 conditions per place. [2023-11-06 23:00:53,194 INFO L140 encePairwiseOnDemand]: 416/423 looper letters, 26 selfloop transitions, 37 changer transitions 0/65 dead transitions. [2023-11-06 23:00:53,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 65 transitions, 458 flow [2023-11-06 23:00:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:00:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 23:00:53,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1825 transitions. [2023-11-06 23:00:53,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3595350669818755 [2023-11-06 23:00:53,204 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1825 transitions. [2023-11-06 23:00:53,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1825 transitions. [2023-11-06 23:00:53,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:53,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1825 transitions. [2023-11-06 23:00:53,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 152.08333333333334) internal successors, (1825), 12 states have internal predecessors, (1825), 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) [2023-11-06 23:00:53,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 423.0) internal successors, (5499), 13 states have internal predecessors, (5499), 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) [2023-11-06 23:00:53,237 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 423.0) internal successors, (5499), 13 states have internal predecessors, (5499), 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) [2023-11-06 23:00:53,237 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 212 flow. Second operand 12 states and 1825 transitions. [2023-11-06 23:00:53,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 65 transitions, 458 flow [2023-11-06 23:00:53,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 65 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:00:53,241 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 457 flow [2023-11-06 23:00:53,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=457, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2023-11-06 23:00:53,243 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2023-11-06 23:00:53,243 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 457 flow [2023-11-06 23:00:53,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 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) [2023-11-06 23:00:53,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:53,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:53,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:53,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:00:53,457 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:00:53,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:53,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2107750844, now seen corresponding path program 1 times [2023-11-06 23:00:53,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:53,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403331802] [2023-11-06 23:00:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:53,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:00:53,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:53,463 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:00:53,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:53,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:00:53,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:53,582 INFO L351 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 [2023-11-06 23:00:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:00:53,603 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:53,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:53,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403331802] [2023-11-06 23:00:53,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403331802] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:53,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:53,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:00:53,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130999179] [2023-11-06 23:00:53,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:53,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:00:53,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:53,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:00:53,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:00:53,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 423 [2023-11-06 23:00:53,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 457 flow. Second operand has 4 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 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) [2023-11-06 23:00:53,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:53,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 423 [2023-11-06 23:00:53,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:54,168 INFO L124 PetriNetUnfolderBase]: 476/760 cut-off events. [2023-11-06 23:00:54,168 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2023-11-06 23:00:54,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2112 conditions, 760 events. 476/760 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 3623 event pairs, 218 based on Foata normal form. 0/420 useless extension candidates. Maximal degree in co-relation 2089. Up to 698 conditions per place. [2023-11-06 23:00:54,176 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 51 selfloop transitions, 10 changer transitions 0/63 dead transitions. [2023-11-06 23:00:54,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 573 flow [2023-11-06 23:00:54,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:00:54,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:00:54,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 643 transitions. [2023-11-06 23:00:54,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38002364066193856 [2023-11-06 23:00:54,180 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 643 transitions. [2023-11-06 23:00:54,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 643 transitions. [2023-11-06 23:00:54,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:54,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 643 transitions. [2023-11-06 23:00:54,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 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) [2023-11-06 23:00:54,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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) [2023-11-06 23:00:54,188 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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) [2023-11-06 23:00:54,188 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 457 flow. Second operand 4 states and 643 transitions. [2023-11-06 23:00:54,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 573 flow [2023-11-06 23:00:54,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 63 transitions, 461 flow, removed 33 selfloop flow, removed 5 redundant places. [2023-11-06 23:00:54,194 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 359 flow [2023-11-06 23:00:54,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=359, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2023-11-06 23:00:54,195 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2023-11-06 23:00:54,195 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 359 flow [2023-11-06 23:00:54,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 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) [2023-11-06 23:00:54,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:54,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:54,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:54,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:00:54,408 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:00:54,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:54,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2107750843, now seen corresponding path program 1 times [2023-11-06 23:00:54,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:54,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142550513] [2023-11-06 23:00:54,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:54,409 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 [2023-11-06 23:00:54,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:54,410 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:00:54,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:54,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:00:54,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:00:54,632 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:54,632 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:54,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142550513] [2023-11-06 23:00:54,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142550513] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:54,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:54,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:00:54,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139493836] [2023-11-06 23:00:54,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:54,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:00:54,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:54,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:00:54,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:00:54,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 423 [2023-11-06 23:00:54,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 359 flow. Second operand has 4 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 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) [2023-11-06 23:00:54,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:54,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 423 [2023-11-06 23:00:54,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:55,279 INFO L124 PetriNetUnfolderBase]: 504/845 cut-off events. [2023-11-06 23:00:55,279 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2023-11-06 23:00:55,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2232 conditions, 845 events. 504/845 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 4337 event pairs, 248 based on Foata normal form. 6/530 useless extension candidates. Maximal degree in co-relation 2209. Up to 730 conditions per place. [2023-11-06 23:00:55,287 INFO L140 encePairwiseOnDemand]: 414/423 looper letters, 60 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2023-11-06 23:00:55,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 75 transitions, 539 flow [2023-11-06 23:00:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:00:55,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:00:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 661 transitions. [2023-11-06 23:00:55,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39066193853427894 [2023-11-06 23:00:55,291 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 661 transitions. [2023-11-06 23:00:55,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 661 transitions. [2023-11-06 23:00:55,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:55,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 661 transitions. [2023-11-06 23:00:55,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 165.25) internal successors, (661), 4 states have internal predecessors, (661), 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) [2023-11-06 23:00:55,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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) [2023-11-06 23:00:55,299 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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) [2023-11-06 23:00:55,299 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 359 flow. Second operand 4 states and 661 transitions. [2023-11-06 23:00:55,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 75 transitions, 539 flow [2023-11-06 23:00:55,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 75 transitions, 528 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:00:55,309 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 387 flow [2023-11-06 23:00:55,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=387, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2023-11-06 23:00:55,310 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2023-11-06 23:00:55,311 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 387 flow [2023-11-06 23:00:55,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 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) [2023-11-06 23:00:55,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:55,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:55,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:55,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:00:55,519 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:00:55,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:55,519 INFO L85 PathProgramCache]: Analyzing trace with hash -2107750838, now seen corresponding path program 1 times [2023-11-06 23:00:55,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:55,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129464669] [2023-11-06 23:00:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:55,520 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 [2023-11-06 23:00:55,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:55,521 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:00:55,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:00:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:55,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 23:00:55,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:55,681 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:00:55,688 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:00:55,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:55,721 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:00:55,731 INFO L351 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 [2023-11-06 23:00:55,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:55,743 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:00:55,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:55,758 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:00:55,767 INFO L351 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 [2023-11-06 23:00:55,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:55,778 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:00:55,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:55,796 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:00:55,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:55,910 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:00:55,935 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 23:00:55,935 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-06 23:00:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:56,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:56,546 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:56,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129464669] [2023-11-06 23:00:56,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129464669] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:56,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:00:56,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-06 23:00:56,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131082212] [2023-11-06 23:00:56,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:56,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:00:56,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:56,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:00:56,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:01:00,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 423 [2023-11-06 23:01:00,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 387 flow. Second operand has 8 states, 8 states have (on average 138.5) internal successors, (1108), 8 states have internal predecessors, (1108), 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) [2023-11-06 23:01:00,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:00,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 423 [2023-11-06 23:01:00,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:03,262 INFO L124 PetriNetUnfolderBase]: 858/1554 cut-off events. [2023-11-06 23:01:03,263 INFO L125 PetriNetUnfolderBase]: For 709/709 co-relation queries the response was YES. [2023-11-06 23:01:03,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4640 conditions, 1554 events. 858/1554 cut-off events. For 709/709 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 10121 event pairs, 440 based on Foata normal form. 3/1192 useless extension candidates. Maximal degree in co-relation 4617. Up to 633 conditions per place. [2023-11-06 23:01:03,275 INFO L140 encePairwiseOnDemand]: 411/423 looper letters, 106 selfloop transitions, 32 changer transitions 2/142 dead transitions. [2023-11-06 23:01:03,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 142 transitions, 1103 flow [2023-11-06 23:01:03,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:01:03,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:01:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1872 transitions. [2023-11-06 23:01:03,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3404255319148936 [2023-11-06 23:01:03,284 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1872 transitions. [2023-11-06 23:01:03,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1872 transitions. [2023-11-06 23:01:03,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:03,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1872 transitions. [2023-11-06 23:01:03,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 144.0) internal successors, (1872), 13 states have internal predecessors, (1872), 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) [2023-11-06 23:01:03,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 423.0) internal successors, (5922), 14 states have internal predecessors, (5922), 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) [2023-11-06 23:01:03,312 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 423.0) internal successors, (5922), 14 states have internal predecessors, (5922), 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) [2023-11-06 23:01:03,321 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 387 flow. Second operand 13 states and 1872 transitions. [2023-11-06 23:01:03,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 142 transitions, 1103 flow [2023-11-06 23:01:03,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 142 transitions, 1069 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:01:03,350 INFO L231 Difference]: Finished difference. Result has 83 places, 85 transitions, 688 flow [2023-11-06 23:01:03,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=688, PETRI_PLACES=83, PETRI_TRANSITIONS=85} [2023-11-06 23:01:03,351 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2023-11-06 23:01:03,352 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 85 transitions, 688 flow [2023-11-06 23:01:03,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 138.5) internal successors, (1108), 8 states have internal predecessors, (1108), 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) [2023-11-06 23:01:03,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:03,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:03,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:03,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:01:03,565 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:01:03,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:03,565 INFO L85 PathProgramCache]: Analyzing trace with hash -2107750839, now seen corresponding path program 1 times [2023-11-06 23:01:03,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:01:03,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238173429] [2023-11-06 23:01:03,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:03,566 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 [2023-11-06 23:01:03,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:01:03,568 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:01:03,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:01:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:03,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:01:03,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:03,695 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-06 23:01:03,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:03,705 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:01:03,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:03,714 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:01:03,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:03,719 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:01:03,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:03,726 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:01:03,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:03,734 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:01:03,762 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:01:03,763 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 23:01:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:01:03,807 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:03,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:01:03,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238173429] [2023-11-06 23:01:03,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238173429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:03,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:03,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:01:03,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338876337] [2023-11-06 23:01:03,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:03,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:01:03,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:01:03,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:01:03,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:01:04,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 423 [2023-11-06 23:01:04,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 688 flow. Second operand has 4 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 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) [2023-11-06 23:01:04,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:04,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 423 [2023-11-06 23:01:04,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:04,643 INFO L124 PetriNetUnfolderBase]: 567/1081 cut-off events. [2023-11-06 23:01:04,643 INFO L125 PetriNetUnfolderBase]: For 2168/2168 co-relation queries the response was YES. [2023-11-06 23:01:04,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3724 conditions, 1081 events. 567/1081 cut-off events. For 2168/2168 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 6638 event pairs, 319 based on Foata normal form. 93/1085 useless extension candidates. Maximal degree in co-relation 3689. Up to 981 conditions per place. [2023-11-06 23:01:04,656 INFO L140 encePairwiseOnDemand]: 418/423 looper letters, 53 selfloop transitions, 27 changer transitions 1/83 dead transitions. [2023-11-06 23:01:04,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 83 transitions, 840 flow [2023-11-06 23:01:04,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:01:04,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:01:04,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 795 transitions. [2023-11-06 23:01:04,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375886524822695 [2023-11-06 23:01:04,661 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 795 transitions. [2023-11-06 23:01:04,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 795 transitions. [2023-11-06 23:01:04,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:04,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 795 transitions. [2023-11-06 23:01:04,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 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) [2023-11-06 23:01:04,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 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) [2023-11-06 23:01:04,670 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 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) [2023-11-06 23:01:04,670 INFO L175 Difference]: Start difference. First operand has 83 places, 85 transitions, 688 flow. Second operand 5 states and 795 transitions. [2023-11-06 23:01:04,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 83 transitions, 840 flow [2023-11-06 23:01:04,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 83 transitions, 832 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-06 23:01:04,684 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 711 flow [2023-11-06 23:01:04,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=711, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2023-11-06 23:01:04,685 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2023-11-06 23:01:04,685 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 711 flow [2023-11-06 23:01:04,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 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) [2023-11-06 23:01:04,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:04,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:04,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:04,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:01:04,898 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:01:04,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:04,898 INFO L85 PathProgramCache]: Analyzing trace with hash -901785521, now seen corresponding path program 1 times [2023-11-06 23:01:04,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:01:04,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682373881] [2023-11-06 23:01:04,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:04,899 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 [2023-11-06 23:01:04,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:01:04,901 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:01:04,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:01:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:05,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 23:01:05,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:05,074 INFO L351 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 [2023-11-06 23:01:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:01:05,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:05,283 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:01:05,284 INFO L351 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 237 treesize of output 62 [2023-11-06 23:01:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:01:06,034 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:01:06,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682373881] [2023-11-06 23:01:06,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682373881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:01:06,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:01:06,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-06 23:01:06,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865584218] [2023-11-06 23:01:06,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:01:06,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:01:06,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:01:06,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:01:06,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:01:13,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 423 [2023-11-06 23:01:13,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 711 flow. Second operand has 8 states, 8 states have (on average 141.5) internal successors, (1132), 8 states have internal predecessors, (1132), 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) [2023-11-06 23:01:13,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:13,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 423 [2023-11-06 23:01:13,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:17,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:19,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:21,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:23,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:25,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:27,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:28,695 INFO L124 PetriNetUnfolderBase]: 673/1285 cut-off events. [2023-11-06 23:01:28,695 INFO L125 PetriNetUnfolderBase]: For 2957/2957 co-relation queries the response was YES. [2023-11-06 23:01:28,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4371 conditions, 1285 events. 673/1285 cut-off events. For 2957/2957 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7947 event pairs, 356 based on Foata normal form. 102/1359 useless extension candidates. Maximal degree in co-relation 4334. Up to 490 conditions per place. [2023-11-06 23:01:28,705 INFO L140 encePairwiseOnDemand]: 416/423 looper letters, 91 selfloop transitions, 36 changer transitions 1/130 dead transitions. [2023-11-06 23:01:28,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 1203 flow [2023-11-06 23:01:28,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:01:28,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:01:28,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1334 transitions. [2023-11-06 23:01:28,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35040714473338586 [2023-11-06 23:01:28,712 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1334 transitions. [2023-11-06 23:01:28,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1334 transitions. [2023-11-06 23:01:28,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:28,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1334 transitions. [2023-11-06 23:01:28,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 148.22222222222223) internal successors, (1334), 9 states have internal predecessors, (1334), 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) [2023-11-06 23:01:28,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 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) [2023-11-06 23:01:28,745 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 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) [2023-11-06 23:01:28,745 INFO L175 Difference]: Start difference. First operand has 85 places, 82 transitions, 711 flow. Second operand 9 states and 1334 transitions. [2023-11-06 23:01:28,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 1203 flow [2023-11-06 23:01:28,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 130 transitions, 1164 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 23:01:28,757 INFO L231 Difference]: Finished difference. Result has 92 places, 81 transitions, 750 flow [2023-11-06 23:01:28,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=750, PETRI_PLACES=92, PETRI_TRANSITIONS=81} [2023-11-06 23:01:28,758 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 37 predicate places. [2023-11-06 23:01:28,759 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 81 transitions, 750 flow [2023-11-06 23:01:28,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 141.5) internal successors, (1132), 8 states have internal predecessors, (1132), 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) [2023-11-06 23:01:28,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:28,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:28,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:28,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:01:28,972 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:01:28,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:28,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2109423942, now seen corresponding path program 1 times [2023-11-06 23:01:28,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:01:28,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055033460] [2023-11-06 23:01:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:28,973 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:01:28,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:01:28,974 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:01:28,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:01:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:29,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:01:29,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:29,383 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2023-11-06 23:01:29,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:01:29,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:29,575 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 62 [2023-11-06 23:01:29,582 INFO L351 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 53 treesize of output 49 [2023-11-06 23:01:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:01:30,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:01:30,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055033460] [2023-11-06 23:01:30,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055033460] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:01:30,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:01:30,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 23:01:30,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429382298] [2023-11-06 23:01:30,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:01:30,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:01:30,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:01:30,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:01:30,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:01:41,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:41,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 423 [2023-11-06 23:01:41,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 81 transitions, 750 flow. Second operand has 10 states, 10 states have (on average 142.6) internal successors, (1426), 10 states have internal predecessors, (1426), 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) [2023-11-06 23:01:41,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:41,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 423 [2023-11-06 23:01:41,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:49,952 INFO L124 PetriNetUnfolderBase]: 988/1820 cut-off events. [2023-11-06 23:01:49,952 INFO L125 PetriNetUnfolderBase]: For 3717/3717 co-relation queries the response was YES. [2023-11-06 23:01:49,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6486 conditions, 1820 events. 988/1820 cut-off events. For 3717/3717 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 11641 event pairs, 291 based on Foata normal form. 103/1905 useless extension candidates. Maximal degree in co-relation 6448. Up to 701 conditions per place. [2023-11-06 23:01:49,966 INFO L140 encePairwiseOnDemand]: 410/423 looper letters, 132 selfloop transitions, 26 changer transitions 4/164 dead transitions. [2023-11-06 23:01:49,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 164 transitions, 1497 flow [2023-11-06 23:01:49,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:01:49,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 23:01:49,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2079 transitions. [2023-11-06 23:01:49,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35106382978723405 [2023-11-06 23:01:49,974 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2079 transitions. [2023-11-06 23:01:49,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2079 transitions. [2023-11-06 23:01:49,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:49,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2079 transitions. [2023-11-06 23:01:49,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 148.5) internal successors, (2079), 14 states have internal predecessors, (2079), 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) [2023-11-06 23:01:49,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 423.0) internal successors, (6345), 15 states have internal predecessors, (6345), 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) [2023-11-06 23:01:49,991 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 423.0) internal successors, (6345), 15 states have internal predecessors, (6345), 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) [2023-11-06 23:01:49,991 INFO L175 Difference]: Start difference. First operand has 92 places, 81 transitions, 750 flow. Second operand 14 states and 2079 transitions. [2023-11-06 23:01:49,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 164 transitions, 1497 flow [2023-11-06 23:01:50,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 164 transitions, 1458 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-06 23:01:50,007 INFO L231 Difference]: Finished difference. Result has 106 places, 90 transitions, 916 flow [2023-11-06 23:01:50,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=711, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=916, PETRI_PLACES=106, PETRI_TRANSITIONS=90} [2023-11-06 23:01:50,008 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2023-11-06 23:01:50,008 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 90 transitions, 916 flow [2023-11-06 23:01:50,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 142.6) internal successors, (1426), 10 states have internal predecessors, (1426), 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) [2023-11-06 23:01:50,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:50,009 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:50,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:50,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:01:50,221 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:01:50,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:50,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1770543732, now seen corresponding path program 1 times [2023-11-06 23:01:50,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:01:50,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457131694] [2023-11-06 23:01:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:50,222 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 [2023-11-06 23:01:50,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:01:50,223 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:01:50,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:01:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:50,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:01:50,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:50,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:50,849 INFO L351 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 [2023-11-06 23:01:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:51,180 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:01:51,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457131694] [2023-11-06 23:01:51,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457131694] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:01:51,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:01:51,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 23:01:51,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505920135] [2023-11-06 23:01:51,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:01:51,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:01:51,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:01:51,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:01:51,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:01:53,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 423 [2023-11-06 23:01:53,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 90 transitions, 916 flow. Second operand has 12 states, 12 states have (on average 148.5) internal successors, (1782), 12 states have internal predecessors, (1782), 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) [2023-11-06 23:01:53,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:53,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 423 [2023-11-06 23:01:53,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:56,499 INFO L124 PetriNetUnfolderBase]: 1040/1928 cut-off events. [2023-11-06 23:01:56,499 INFO L125 PetriNetUnfolderBase]: For 6930/6930 co-relation queries the response was YES. [2023-11-06 23:01:56,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7913 conditions, 1928 events. 1040/1928 cut-off events. For 6930/6930 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 12606 event pairs, 220 based on Foata normal form. 108/1958 useless extension candidates. Maximal degree in co-relation 7869. Up to 734 conditions per place. [2023-11-06 23:01:56,516 INFO L140 encePairwiseOnDemand]: 413/423 looper letters, 73 selfloop transitions, 59 changer transitions 8/142 dead transitions. [2023-11-06 23:01:56,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 142 transitions, 1500 flow [2023-11-06 23:01:56,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 23:01:56,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 23:01:56,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1708 transitions. [2023-11-06 23:01:56,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36707500537287774 [2023-11-06 23:01:56,523 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1708 transitions. [2023-11-06 23:01:56,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1708 transitions. [2023-11-06 23:01:56,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:56,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1708 transitions. [2023-11-06 23:01:56,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 155.27272727272728) internal successors, (1708), 11 states have internal predecessors, (1708), 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) [2023-11-06 23:01:56,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 423.0) internal successors, (5076), 12 states have internal predecessors, (5076), 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) [2023-11-06 23:01:56,551 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 423.0) internal successors, (5076), 12 states have internal predecessors, (5076), 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) [2023-11-06 23:01:56,551 INFO L175 Difference]: Start difference. First operand has 106 places, 90 transitions, 916 flow. Second operand 11 states and 1708 transitions. [2023-11-06 23:01:56,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 142 transitions, 1500 flow [2023-11-06 23:01:56,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 142 transitions, 1481 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-06 23:01:56,573 INFO L231 Difference]: Finished difference. Result has 116 places, 100 transitions, 1195 flow [2023-11-06 23:01:56,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1195, PETRI_PLACES=116, PETRI_TRANSITIONS=100} [2023-11-06 23:01:56,574 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2023-11-06 23:01:56,574 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 100 transitions, 1195 flow [2023-11-06 23:01:56,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 148.5) internal successors, (1782), 12 states have internal predecessors, (1782), 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) [2023-11-06 23:01:56,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:56,575 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:56,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:01:56,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:01:56,786 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:01:56,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:56,787 INFO L85 PathProgramCache]: Analyzing trace with hash 2067974055, now seen corresponding path program 2 times [2023-11-06 23:01:56,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:01:56,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335163287] [2023-11-06 23:01:56,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:01:56,787 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 [2023-11-06 23:01:56,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:01:56,788 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:01:56,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:01:56,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 23:01:56,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:01:56,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 23:01:56,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:56,926 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:01:56,932 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:01:56,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:56,975 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:01:56,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:56,988 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:56,997 INFO L351 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 [2023-11-06 23:01:57,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:57,009 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:01:57,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:57,023 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:57,031 INFO L351 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 [2023-11-06 23:01:57,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:57,042 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:01:57,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:57,112 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:01:57,135 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 23:01:57,135 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-06 23:01:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 23:01:57,228 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:57,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:01:57,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335163287] [2023-11-06 23:01:57,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335163287] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:57,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:57,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:01:57,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089011978] [2023-11-06 23:01:57,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:57,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:01:57,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:01:57,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:01:57,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:01:57,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 423 [2023-11-06 23:01:57,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 100 transitions, 1195 flow. Second operand has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 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) [2023-11-06 23:01:57,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:57,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 423 [2023-11-06 23:01:57,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:58,068 INFO L124 PetriNetUnfolderBase]: 705/1352 cut-off events. [2023-11-06 23:01:58,068 INFO L125 PetriNetUnfolderBase]: For 11368/11368 co-relation queries the response was YES. [2023-11-06 23:01:58,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6100 conditions, 1352 events. 705/1352 cut-off events. For 11368/11368 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 8291 event pairs, 348 based on Foata normal form. 135/1393 useless extension candidates. Maximal degree in co-relation 6051. Up to 1295 conditions per place. [2023-11-06 23:01:58,080 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 81 selfloop transitions, 12 changer transitions 1/96 dead transitions. [2023-11-06 23:01:58,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 96 transitions, 1332 flow [2023-11-06 23:01:58,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:01:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:01:58,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 623 transitions. [2023-11-06 23:01:58,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682033096926714 [2023-11-06 23:01:58,082 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 623 transitions. [2023-11-06 23:01:58,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 623 transitions. [2023-11-06 23:01:58,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:58,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 623 transitions. [2023-11-06 23:01:58,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 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) [2023-11-06 23:01:58,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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) [2023-11-06 23:01:58,087 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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) [2023-11-06 23:01:58,088 INFO L175 Difference]: Start difference. First operand has 116 places, 100 transitions, 1195 flow. Second operand 4 states and 623 transitions. [2023-11-06 23:01:58,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 96 transitions, 1332 flow [2023-11-06 23:01:58,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 96 transitions, 1212 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-11-06 23:01:58,108 INFO L231 Difference]: Finished difference. Result has 110 places, 95 transitions, 1031 flow [2023-11-06 23:01:58,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1031, PETRI_PLACES=110, PETRI_TRANSITIONS=95} [2023-11-06 23:01:58,109 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 55 predicate places. [2023-11-06 23:01:58,109 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 95 transitions, 1031 flow [2023-11-06 23:01:58,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 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) [2023-11-06 23:01:58,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:58,110 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:58,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:58,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:01:58,321 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:01:58,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:58,322 INFO L85 PathProgramCache]: Analyzing trace with hash 926382277, now seen corresponding path program 2 times [2023-11-06 23:01:58,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:01:58,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032976952] [2023-11-06 23:01:58,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:01:58,322 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 [2023-11-06 23:01:58,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:01:58,323 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:01:58,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:01:58,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 23:01:58,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:01:58,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 23:01:58,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:58,481 INFO L351 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 [2023-11-06 23:01:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 23:01:58,637 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:58,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:01:58,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032976952] [2023-11-06 23:01:58,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032976952] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:58,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:58,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:01:58,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164415838] [2023-11-06 23:01:58,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:58,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:01:58,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:01:58,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:01:58,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:01:59,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 423 [2023-11-06 23:01:59,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 95 transitions, 1031 flow. Second operand has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 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) [2023-11-06 23:01:59,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:59,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 423 [2023-11-06 23:01:59,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:59,562 INFO L124 PetriNetUnfolderBase]: 553/1058 cut-off events. [2023-11-06 23:01:59,563 INFO L125 PetriNetUnfolderBase]: For 6286/6286 co-relation queries the response was YES. [2023-11-06 23:01:59,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4393 conditions, 1058 events. 553/1058 cut-off events. For 6286/6286 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6086 event pairs, 258 based on Foata normal form. 77/1054 useless extension candidates. Maximal degree in co-relation 4346. Up to 958 conditions per place. [2023-11-06 23:01:59,569 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 62 selfloop transitions, 22 changer transitions 0/86 dead transitions. [2023-11-06 23:01:59,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 86 transitions, 1076 flow [2023-11-06 23:01:59,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:01:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:01:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 637 transitions. [2023-11-06 23:01:59,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3764775413711584 [2023-11-06 23:01:59,573 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 637 transitions. [2023-11-06 23:01:59,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 637 transitions. [2023-11-06 23:01:59,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:59,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 637 transitions. [2023-11-06 23:01:59,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 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) [2023-11-06 23:01:59,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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) [2023-11-06 23:01:59,577 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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) [2023-11-06 23:01:59,577 INFO L175 Difference]: Start difference. First operand has 110 places, 95 transitions, 1031 flow. Second operand 4 states and 637 transitions. [2023-11-06 23:01:59,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 86 transitions, 1076 flow [2023-11-06 23:01:59,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 86 transitions, 993 flow, removed 12 selfloop flow, removed 10 redundant places. [2023-11-06 23:01:59,592 INFO L231 Difference]: Finished difference. Result has 98 places, 86 transitions, 869 flow [2023-11-06 23:01:59,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=869, PETRI_PLACES=98, PETRI_TRANSITIONS=86} [2023-11-06 23:01:59,592 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2023-11-06 23:01:59,593 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 86 transitions, 869 flow [2023-11-06 23:01:59,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 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) [2023-11-06 23:01:59,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:59,593 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 1, 1, 1] [2023-11-06 23:01:59,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:59,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:01:59,805 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:01:59,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:59,805 INFO L85 PathProgramCache]: Analyzing trace with hash -153837627, now seen corresponding path program 1 times [2023-11-06 23:01:59,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:01:59,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005043837] [2023-11-06 23:01:59,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:59,806 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 [2023-11-06 23:01:59,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:01:59,807 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:01:59,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:01:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:59,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 23:01:59,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:59,970 INFO L351 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 [2023-11-06 23:02:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:00,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:02,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:02:02,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005043837] [2023-11-06 23:02:02,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005043837] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:02,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:02:02,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-11-06 23:02:02,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804934983] [2023-11-06 23:02:02,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:02,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 23:02:02,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:02:02,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 23:02:02,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:02:17,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 423 [2023-11-06 23:02:17,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 86 transitions, 869 flow. Second operand has 20 states, 20 states have (on average 147.05) internal successors, (2941), 20 states have internal predecessors, (2941), 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) [2023-11-06 23:02:17,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:17,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 423 [2023-11-06 23:02:17,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:23,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:02:25,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:02:27,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:02:29,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:02:31,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:02:33,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:02:35,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:02:37,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:02:44,564 INFO L124 PetriNetUnfolderBase]: 594/1140 cut-off events. [2023-11-06 23:02:44,564 INFO L125 PetriNetUnfolderBase]: For 4735/4735 co-relation queries the response was YES. [2023-11-06 23:02:44,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4437 conditions, 1140 events. 594/1140 cut-off events. For 4735/4735 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6561 event pairs, 258 based on Foata normal form. 41/1100 useless extension candidates. Maximal degree in co-relation 4398. Up to 1014 conditions per place. [2023-11-06 23:02:44,575 INFO L140 encePairwiseOnDemand]: 416/423 looper letters, 37 selfloop transitions, 69 changer transitions 0/108 dead transitions. [2023-11-06 23:02:44,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 108 transitions, 1288 flow [2023-11-06 23:02:44,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 23:02:44,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 23:02:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3007 transitions. [2023-11-06 23:02:44,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35543735224586287 [2023-11-06 23:02:44,582 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3007 transitions. [2023-11-06 23:02:44,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3007 transitions. [2023-11-06 23:02:44,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:44,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3007 transitions. [2023-11-06 23:02:44,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 150.35) internal successors, (3007), 20 states have internal predecessors, (3007), 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) [2023-11-06 23:02:44,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 423.0) internal successors, (8883), 21 states have internal predecessors, (8883), 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) [2023-11-06 23:02:44,601 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 423.0) internal successors, (8883), 21 states have internal predecessors, (8883), 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) [2023-11-06 23:02:44,602 INFO L175 Difference]: Start difference. First operand has 98 places, 86 transitions, 869 flow. Second operand 20 states and 3007 transitions. [2023-11-06 23:02:44,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 108 transitions, 1288 flow [2023-11-06 23:02:44,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 108 transitions, 1243 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:02:44,618 INFO L231 Difference]: Finished difference. Result has 125 places, 108 transitions, 1296 flow [2023-11-06 23:02:44,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1296, PETRI_PLACES=125, PETRI_TRANSITIONS=108} [2023-11-06 23:02:44,619 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2023-11-06 23:02:44,620 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 108 transitions, 1296 flow [2023-11-06 23:02:44,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 147.05) internal successors, (2941), 20 states have internal predecessors, (2941), 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) [2023-11-06 23:02:44,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:44,621 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 1, 1] [2023-11-06 23:02:44,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:44,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:02:44,833 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-06 23:02:44,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:44,833 INFO L85 PathProgramCache]: Analyzing trace with hash -2107403148, now seen corresponding path program 3 times [2023-11-06 23:02:44,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:02:44,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112120130] [2023-11-06 23:02:44,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:02:44,834 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 [2023-11-06 23:02:44,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:02:44,836 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:02:44,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_213195f3-7266-4a44-b738-f4539ea7864c/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:02:45,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-06 23:02:45,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:45,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 23:02:45,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:45,214 INFO L351 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 [2023-11-06 23:02:45,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:45,234 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:02:45,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:45,261 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:02:45,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:45,300 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:02:45,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:45,314 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:02:45,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:45,323 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:02:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:46,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:49,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:02:49,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112120130] [2023-11-06 23:02:49,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112120130] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:49,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:02:49,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-11-06 23:02:49,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956067288] [2023-11-06 23:02:49,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:49,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 23:02:49,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:02:49,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 23:02:49,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2023-11-06 23:03:15,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 423 [2023-11-06 23:03:15,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 108 transitions, 1296 flow. Second operand has 26 states, 26 states have (on average 147.0) internal successors, (3822), 26 states have internal predecessors, (3822), 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) [2023-11-06 23:03:15,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:15,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 423 [2023-11-06 23:03:15,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:31,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:03:33,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:03:35,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:03:37,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:03:39,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:03:41,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []