./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 16:15:06,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 16:15:06,845 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 16:15:06,850 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 16:15:06,851 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 16:15:06,892 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 16:15:06,893 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 16:15:06,893 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 16:15:06,894 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 16:15:06,895 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 16:15:06,896 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 16:15:06,896 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 16:15:06,897 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 16:15:06,900 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 16:15:06,900 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 16:15:06,901 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 16:15:06,901 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 16:15:06,902 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 16:15:06,902 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 16:15:06,902 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 16:15:06,903 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 16:15:06,907 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 16:15:06,907 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 16:15:06,908 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 16:15:06,908 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 16:15:06,908 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 16:15:06,908 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 16:15:06,908 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 16:15:06,909 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 16:15:06,909 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 16:15:06,910 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 16:15:06,910 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 16:15:06,910 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 16:15:06,911 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:15:06,911 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 16:15:06,911 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 16:15:06,911 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 16:15:06,912 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 16:15:06,912 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 16:15:06,912 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 16:15:06,913 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 16:15:06,913 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 16:15:06,913 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_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 [2024-11-08 16:15:07,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 16:15:07,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 16:15:07,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 16:15:07,308 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 16:15:07,308 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 16:15:07,310 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i Unable to find full path for "g++" [2024-11-08 16:15:09,458 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 16:15:09,857 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 16:15:09,858 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2024-11-08 16:15:09,882 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/data/9ba1b2d6c/9ed6aaaef73f41cb8eb934124494c417/FLAG5fc8f7336 [2024-11-08 16:15:09,901 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/data/9ba1b2d6c/9ed6aaaef73f41cb8eb934124494c417 [2024-11-08 16:15:09,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 16:15:09,907 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 16:15:09,908 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 16:15:09,909 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 16:15:09,918 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 16:15:09,919 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:15:09" (1/1) ... [2024-11-08 16:15:09,922 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33918ef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:15:09, skipping insertion in model container [2024-11-08 16:15:09,923 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:15:09" (1/1) ... [2024-11-08 16:15:09,996 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:15:10,569 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 16:15:10,570 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 16:15:10,570 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 16:15:10,571 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 16:15:10,614 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:15:10,668 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-11-08 16:15:10,669 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5e3b7a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:15:10, skipping insertion in model container [2024-11-08 16:15:10,670 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 16:15:10,670 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-11-08 16:15:10,673 INFO L158 Benchmark]: Toolchain (without parser) took 765.01ms. Allocated memory is still 136.3MB. Free memory was 97.4MB in the beginning and 77.5MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-11-08 16:15:10,673 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 136.3MB. Free memory is still 109.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-08 16:15:10,675 INFO L158 Benchmark]: CACSL2BoogieTranslator took 761.73ms. Allocated memory is still 136.3MB. Free memory was 97.4MB in the beginning and 77.9MB in the end (delta: 19.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-11-08 16:15:10,676 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 136.3MB. Free memory is still 109.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 761.73ms. Allocated memory is still 136.3MB. Free memory was 97.4MB in the beginning and 77.9MB in the end (delta: 19.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1051]: 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 16:15:12,842 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 16:15:12,924 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-08 16:15:12,930 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 16:15:12,933 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 16:15:12,975 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 16:15:12,978 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 16:15:12,978 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 16:15:12,979 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 16:15:12,979 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 16:15:12,979 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 16:15:12,980 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 16:15:12,981 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 16:15:12,982 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 16:15:12,982 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 16:15:12,982 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 16:15:12,983 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 16:15:12,983 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 16:15:12,983 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 16:15:12,984 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 16:15:12,984 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 16:15:12,987 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 16:15:12,987 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 16:15:12,987 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 16:15:12,988 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 16:15:12,988 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-08 16:15:12,988 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 16:15:12,988 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-08 16:15:12,989 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 16:15:12,989 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 16:15:12,989 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 16:15:12,990 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 16:15:12,990 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 16:15:12,990 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 16:15:12,990 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 16:15:12,991 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:15:12,991 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 16:15:12,991 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 16:15:12,992 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-08 16:15:12,992 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-08 16:15:12,992 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 16:15:12,993 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 16:15:12,993 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 16:15:12,993 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 16:15:12,993 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_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 [2024-11-08 16:15:13,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 16:15:13,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 16:15:13,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 16:15:13,443 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 16:15:13,444 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 16:15:13,446 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i Unable to find full path for "g++" [2024-11-08 16:15:15,469 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 16:15:15,860 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 16:15:15,861 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2024-11-08 16:15:15,883 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/data/08b415d62/03810cc25ba740babbeb8902b3924dca/FLAG1c33fd9e3 [2024-11-08 16:15:15,917 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/data/08b415d62/03810cc25ba740babbeb8902b3924dca [2024-11-08 16:15:15,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 16:15:15,923 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 16:15:15,925 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 16:15:15,925 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 16:15:15,934 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 16:15:15,937 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:15:15" (1/1) ... [2024-11-08 16:15:15,939 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8d1ae47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:15:15, skipping insertion in model container [2024-11-08 16:15:15,939 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:15:15" (1/1) ... [2024-11-08 16:15:16,025 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:15:16,866 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 16:15:16,866 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 16:15:16,867 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 16:15:16,867 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 16:15:16,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:15:17,011 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-08 16:15:17,031 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:15:17,094 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 16:15:17,095 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 16:15:17,095 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 16:15:17,096 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 16:15:17,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:15:17,161 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 16:15:17,235 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 16:15:17,235 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 16:15:17,236 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 16:15:17,236 WARN L1698 CHandler]: Possible shadowing of function new [2024-11-08 16:15:17,249 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:15:17,339 INFO L204 MainTranslator]: Completed translation [2024-11-08 16:15:17,340 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:15:17 WrapperNode [2024-11-08 16:15:17,340 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 16:15:17,341 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 16:15:17,342 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 16:15:17,342 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 16:15:17,351 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:15:17" (1/1) ... [2024-11-08 16:15:17,394 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:15:17" (1/1) ... [2024-11-08 16:15:17,461 INFO L138 Inliner]: procedures = 284, calls = 126, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 292 [2024-11-08 16:15:17,462 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 16:15:17,462 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 16:15:17,463 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 16:15:17,463 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 16:15:17,485 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:15:17" (1/1) ... [2024-11-08 16:15:17,485 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:15:17" (1/1) ... [2024-11-08 16:15:17,490 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:15:17" (1/1) ... [2024-11-08 16:15:17,534 INFO L175 MemorySlicer]: Split 100 memory accesses to 4 slices as follows [2, 5, 91, 2]. 91 percent of accesses are in the largest equivalence class. The 77 initializations are split as follows [2, 5, 70, 0]. The 13 writes are split as follows [0, 0, 12, 1]. [2024-11-08 16:15:17,535 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:15:17" (1/1) ... [2024-11-08 16:15:17,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:15:17" (1/1) ... [2024-11-08 16:15:17,590 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:15:17" (1/1) ... [2024-11-08 16:15:17,603 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:15:17" (1/1) ... [2024-11-08 16:15:17,611 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:15:17" (1/1) ... [2024-11-08 16:15:17,616 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:15:17" (1/1) ... [2024-11-08 16:15:17,629 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 16:15:17,630 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 16:15:17,630 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 16:15:17,630 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 16:15:17,631 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:15:17" (1/1) ... [2024-11-08 16:15:17,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:15:17,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:15:17,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 16:15:17,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 16:15:17,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-08 16:15:17,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-08 16:15:17,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-11-08 16:15:17,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2024-11-08 16:15:17,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 16:15:17,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-08 16:15:17,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-08 16:15:17,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-08 16:15:17,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-08 16:15:17,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 16:15:17,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-08 16:15:17,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-08 16:15:17,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2024-11-08 16:15:17,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2024-11-08 16:15:17,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-08 16:15:17,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-08 16:15:17,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-08 16:15:17,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-08 16:15:17,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-08 16:15:17,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-08 16:15:17,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-08 16:15:17,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-11-08 16:15:17,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2024-11-08 16:15:17,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2024-11-08 16:15:17,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2024-11-08 16:15:17,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2024-11-08 16:15:17,727 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-08 16:15:17,727 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-08 16:15:17,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 16:15:17,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 16:15:17,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-08 16:15:17,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-08 16:15:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-08 16:15:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-08 16:15:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-08 16:15:17,728 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-08 16:15:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 16:15:17,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 16:15:17,731 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 16:15:17,997 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 16:15:18,000 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 16:15:19,140 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 16:15:19,140 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 16:15:20,996 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 16:15:20,996 INFO L316 CfgBuilder]: Removed 10 assume(true) statements. [2024-11-08 16:15:20,997 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:15:20 BoogieIcfgContainer [2024-11-08 16:15:20,997 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 16:15:20,999 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 16:15:20,999 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 16:15:21,002 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 16:15:21,002 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 04:15:15" (1/3) ... [2024-11-08 16:15:21,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e00c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:15:21, skipping insertion in model container [2024-11-08 16:15:21,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:15:17" (2/3) ... [2024-11-08 16:15:21,004 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e00c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:15:21, skipping insertion in model container [2024-11-08 16:15:21,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:15:20" (3/3) ... [2024-11-08 16:15:21,005 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_92-evilcollapse_racing-deref.i [2024-11-08 16:15:21,023 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 16:15:21,024 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2024-11-08 16:15:21,024 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 16:15:21,142 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-08 16:15:21,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 150 transitions, 307 flow [2024-11-08 16:15:21,264 INFO L124 PetriNetUnfolderBase]: 26/168 cut-off events. [2024-11-08 16:15:21,264 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-08 16:15:21,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 168 events. 26/168 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 592 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2024-11-08 16:15:21,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 150 transitions, 307 flow [2024-11-08 16:15:21,285 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 150 transitions, 307 flow [2024-11-08 16:15:21,302 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 16:15:21,311 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@62fe23cc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 16:15:21,312 INFO L334 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2024-11-08 16:15:21,331 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 16:15:21,331 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-08 16:15:21,331 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 16:15:21,331 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:15:21,332 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 16:15:21,332 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-08 16:15:21,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:15:21,341 INFO L85 PathProgramCache]: Analyzing trace with hash 25675461, now seen corresponding path program 1 times [2024-11-08 16:15:21,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:15:21,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207193565] [2024-11-08 16:15:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:15:21,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:21,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:15:21,357 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:15:21,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 16:15:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:15:21,752 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 16:15:21,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:15:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:15:21,838 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:15:21,839 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 16:15:21,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207193565] [2024-11-08 16:15:21,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207193565] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:15:21,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:15:21,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 16:15:21,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372190343] [2024-11-08 16:15:21,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:15:21,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:15:21,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 16:15:21,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:15:21,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:15:22,137 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 150 [2024-11-08 16:15:22,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 150 transitions, 307 flow. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:22,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:15:22,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 150 [2024-11-08 16:15:22,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:15:22,628 INFO L124 PetriNetUnfolderBase]: 134/499 cut-off events. [2024-11-08 16:15:22,628 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-08 16:15:22,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 765 conditions, 499 events. 134/499 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2582 event pairs, 61 based on Foata normal form. 54/469 useless extension candidates. Maximal degree in co-relation 666. Up to 169 conditions per place. [2024-11-08 16:15:22,640 INFO L140 encePairwiseOnDemand]: 133/150 looper letters, 64 selfloop transitions, 2 changer transitions 0/157 dead transitions. [2024-11-08 16:15:22,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 157 transitions, 453 flow [2024-11-08 16:15:22,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:15:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:15:22,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2024-11-08 16:15:22,656 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.8133333333333334 [2024-11-08 16:15:22,658 INFO L175 Difference]: Start difference. First operand has 129 places, 150 transitions, 307 flow. Second operand 3 states and 366 transitions. [2024-11-08 16:15:22,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 157 transitions, 453 flow [2024-11-08 16:15:22,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 157 transitions, 453 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 16:15:22,670 INFO L231 Difference]: Finished difference. Result has 129 places, 135 transitions, 285 flow [2024-11-08 16:15:22,672 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=285, PETRI_PLACES=129, PETRI_TRANSITIONS=135} [2024-11-08 16:15:22,676 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 0 predicate places. [2024-11-08 16:15:22,677 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 135 transitions, 285 flow [2024-11-08 16:15:22,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:22,677 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:15:22,678 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 16:15:22,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 16:15:22,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:22,879 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-08 16:15:22,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:15:22,880 INFO L85 PathProgramCache]: Analyzing trace with hash 25680197, now seen corresponding path program 1 times [2024-11-08 16:15:22,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:15:22,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763307285] [2024-11-08 16:15:22,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:15:22,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:22,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:15:22,884 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:15:22,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 16:15:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:15:23,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 16:15:23,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:15:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:15:23,259 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:15:23,259 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 16:15:23,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763307285] [2024-11-08 16:15:23,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763307285] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:15:23,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:15:23,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:15:23,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988987674] [2024-11-08 16:15:23,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:15:23,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:15:23,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 16:15:23,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:15:23,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:15:23,702 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 150 [2024-11-08 16:15:23,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 135 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:23,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:15:23,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 150 [2024-11-08 16:15:23,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:15:24,211 INFO L124 PetriNetUnfolderBase]: 134/497 cut-off events. [2024-11-08 16:15:24,212 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-08 16:15:24,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 814 conditions, 497 events. 134/497 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2576 event pairs, 61 based on Foata normal form. 1/419 useless extension candidates. Maximal degree in co-relation 710. Up to 170 conditions per place. [2024-11-08 16:15:24,218 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 64 selfloop transitions, 4 changer transitions 0/155 dead transitions. [2024-11-08 16:15:24,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 155 transitions, 461 flow [2024-11-08 16:15:24,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:15:24,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:15:24,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 418 transitions. [2024-11-08 16:15:24,223 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6966666666666667 [2024-11-08 16:15:24,223 INFO L175 Difference]: Start difference. First operand has 129 places, 135 transitions, 285 flow. Second operand 4 states and 418 transitions. [2024-11-08 16:15:24,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 155 transitions, 461 flow [2024-11-08 16:15:24,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 155 transitions, 457 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:15:24,229 INFO L231 Difference]: Finished difference. Result has 128 places, 133 transitions, 285 flow [2024-11-08 16:15:24,229 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=128, PETRI_TRANSITIONS=133} [2024-11-08 16:15:24,230 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, -1 predicate places. [2024-11-08 16:15:24,231 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 133 transitions, 285 flow [2024-11-08 16:15:24,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:24,232 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:15:24,232 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 16:15:24,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 16:15:24,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:24,433 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-08 16:15:24,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:15:24,434 INFO L85 PathProgramCache]: Analyzing trace with hash 25680198, now seen corresponding path program 1 times [2024-11-08 16:15:24,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:15:24,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544574961] [2024-11-08 16:15:24,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:15:24,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:24,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:15:24,437 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:15:24,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 16:15:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:15:24,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 16:15:24,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:15:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:15:24,923 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:15:24,923 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 16:15:24,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544574961] [2024-11-08 16:15:24,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544574961] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:15:24,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:15:24,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:15:24,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450410639] [2024-11-08 16:15:24,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:15:24,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:15:24,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 16:15:24,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:15:24,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:15:25,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 150 [2024-11-08 16:15:25,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 133 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 88.75) internal successors, (355), 4 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:25,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:15:25,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 150 [2024-11-08 16:15:25,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:15:25,831 INFO L124 PetriNetUnfolderBase]: 139/543 cut-off events. [2024-11-08 16:15:25,831 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-08 16:15:25,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 543 events. 139/543 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2786 event pairs, 100 based on Foata normal form. 4/450 useless extension candidates. Maximal degree in co-relation 743. Up to 265 conditions per place. [2024-11-08 16:15:25,836 INFO L140 encePairwiseOnDemand]: 141/150 looper letters, 48 selfloop transitions, 5 changer transitions 0/137 dead transitions. [2024-11-08 16:15:25,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 137 transitions, 403 flow [2024-11-08 16:15:25,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:15:25,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:15:25,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 409 transitions. [2024-11-08 16:15:25,839 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6816666666666666 [2024-11-08 16:15:25,840 INFO L175 Difference]: Start difference. First operand has 128 places, 133 transitions, 285 flow. Second operand 4 states and 409 transitions. [2024-11-08 16:15:25,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 137 transitions, 403 flow [2024-11-08 16:15:25,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 137 transitions, 391 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:15:25,847 INFO L231 Difference]: Finished difference. Result has 130 places, 137 transitions, 318 flow [2024-11-08 16:15:25,847 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=318, PETRI_PLACES=130, PETRI_TRANSITIONS=137} [2024-11-08 16:15:25,848 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 1 predicate places. [2024-11-08 16:15:25,849 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 137 transitions, 318 flow [2024-11-08 16:15:25,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.75) internal successors, (355), 4 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:25,849 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:15:25,849 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:15:25,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 16:15:26,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:26,050 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-08 16:15:26,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:15:26,051 INFO L85 PathProgramCache]: Analyzing trace with hash -583831907, now seen corresponding path program 1 times [2024-11-08 16:15:26,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:15:26,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383222035] [2024-11-08 16:15:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:15:26,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:26,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:15:26,055 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:15:26,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 16:15:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:15:26,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 16:15:26,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:15:26,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-08 16:15:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:15:26,426 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:15:26,426 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 16:15:26,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383222035] [2024-11-08 16:15:26,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383222035] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:15:26,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:15:26,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:15:26,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019777644] [2024-11-08 16:15:26,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:15:26,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:15:26,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 16:15:26,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:15:26,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:15:26,605 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 150 [2024-11-08 16:15:26,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 137 transitions, 318 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:26,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:15:26,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 150 [2024-11-08 16:15:26,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:15:26,993 INFO L124 PetriNetUnfolderBase]: 141/560 cut-off events. [2024-11-08 16:15:26,994 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-08 16:15:26,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 560 events. 141/560 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2924 event pairs, 100 based on Foata normal form. 0/464 useless extension candidates. Maximal degree in co-relation 836. Up to 259 conditions per place. [2024-11-08 16:15:26,998 INFO L140 encePairwiseOnDemand]: 147/150 looper letters, 44 selfloop transitions, 3 changer transitions 0/136 dead transitions. [2024-11-08 16:15:26,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 136 transitions, 410 flow [2024-11-08 16:15:26,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:15:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:15:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2024-11-08 16:15:27,000 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7177777777777777 [2024-11-08 16:15:27,000 INFO L175 Difference]: Start difference. First operand has 130 places, 137 transitions, 318 flow. Second operand 3 states and 323 transitions. [2024-11-08 16:15:27,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 136 transitions, 410 flow [2024-11-08 16:15:27,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 136 transitions, 407 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 16:15:27,004 INFO L231 Difference]: Finished difference. Result has 130 places, 136 transitions, 319 flow [2024-11-08 16:15:27,005 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=130, PETRI_TRANSITIONS=136} [2024-11-08 16:15:27,005 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 1 predicate places. [2024-11-08 16:15:27,005 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 136 transitions, 319 flow [2024-11-08 16:15:27,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:27,006 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:15:27,006 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:15:27,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 16:15:27,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:27,207 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-08 16:15:27,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:15:27,207 INFO L85 PathProgramCache]: Analyzing trace with hash -583831906, now seen corresponding path program 1 times [2024-11-08 16:15:27,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:15:27,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491354899] [2024-11-08 16:15:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:15:27,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:27,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:15:27,210 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:15:27,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 16:15:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:15:27,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 16:15:27,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:15:27,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 16:15:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:15:27,560 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:15:27,560 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 16:15:27,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491354899] [2024-11-08 16:15:27,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491354899] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:15:27,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:15:27,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:15:27,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922842445] [2024-11-08 16:15:27,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:15:27,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:15:27,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 16:15:27,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:15:27,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:15:27,784 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 150 [2024-11-08 16:15:27,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 136 transitions, 319 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:27,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:15:27,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 150 [2024-11-08 16:15:27,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:15:28,126 INFO L124 PetriNetUnfolderBase]: 141/559 cut-off events. [2024-11-08 16:15:28,126 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-08 16:15:28,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 559 events. 141/559 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2917 event pairs, 100 based on Foata normal form. 0/463 useless extension candidates. Maximal degree in co-relation 835. Up to 259 conditions per place. [2024-11-08 16:15:28,132 INFO L140 encePairwiseOnDemand]: 147/150 looper letters, 44 selfloop transitions, 3 changer transitions 0/135 dead transitions. [2024-11-08 16:15:28,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 135 transitions, 411 flow [2024-11-08 16:15:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:15:28,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:15:28,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2024-11-08 16:15:28,134 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7177777777777777 [2024-11-08 16:15:28,135 INFO L175 Difference]: Start difference. First operand has 130 places, 136 transitions, 319 flow. Second operand 3 states and 323 transitions. [2024-11-08 16:15:28,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 135 transitions, 411 flow [2024-11-08 16:15:28,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 135 transitions, 405 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:15:28,146 INFO L231 Difference]: Finished difference. Result has 129 places, 135 transitions, 317 flow [2024-11-08 16:15:28,147 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=129, PETRI_TRANSITIONS=135} [2024-11-08 16:15:28,147 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 0 predicate places. [2024-11-08 16:15:28,148 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 135 transitions, 317 flow [2024-11-08 16:15:28,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:28,148 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:15:28,148 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:15:28,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 16:15:28,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:28,349 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-08 16:15:28,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:15:28,350 INFO L85 PathProgramCache]: Analyzing trace with hash -918919079, now seen corresponding path program 1 times [2024-11-08 16:15:28,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:15:28,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698819617] [2024-11-08 16:15:28,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:15:28,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:28,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:15:28,353 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:15:28,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 16:15:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:15:28,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 16:15:28,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:15:28,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-08 16:15:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:15:28,730 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:15:28,730 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 16:15:28,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698819617] [2024-11-08 16:15:28,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698819617] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:15:28,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:15:28,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:15:28,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660403459] [2024-11-08 16:15:28,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:15:28,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:15:28,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 16:15:28,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:15:28,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:15:29,014 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 150 [2024-11-08 16:15:29,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 135 transitions, 317 flow. Second operand has 4 states, 4 states have (on average 88.75) internal successors, (355), 4 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:29,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:15:29,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 150 [2024-11-08 16:15:29,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:15:29,457 INFO L124 PetriNetUnfolderBase]: 141/557 cut-off events. [2024-11-08 16:15:29,458 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-08 16:15:29,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 557 events. 141/557 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2902 event pairs, 100 based on Foata normal form. 1/465 useless extension candidates. Maximal degree in co-relation 835. Up to 259 conditions per place. [2024-11-08 16:15:29,462 INFO L140 encePairwiseOnDemand]: 143/150 looper letters, 42 selfloop transitions, 7 changer transitions 0/133 dead transitions. [2024-11-08 16:15:29,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 133 transitions, 411 flow [2024-11-08 16:15:29,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:15:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:15:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 482 transitions. [2024-11-08 16:15:29,464 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6426666666666667 [2024-11-08 16:15:29,464 INFO L175 Difference]: Start difference. First operand has 129 places, 135 transitions, 317 flow. Second operand 5 states and 482 transitions. [2024-11-08 16:15:29,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 133 transitions, 411 flow [2024-11-08 16:15:29,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 133 transitions, 405 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:15:29,468 INFO L231 Difference]: Finished difference. Result has 129 places, 133 transitions, 321 flow [2024-11-08 16:15:29,469 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=321, PETRI_PLACES=129, PETRI_TRANSITIONS=133} [2024-11-08 16:15:29,470 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 0 predicate places. [2024-11-08 16:15:29,470 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 133 transitions, 321 flow [2024-11-08 16:15:29,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.75) internal successors, (355), 4 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:29,471 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:15:29,471 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:15:29,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 16:15:29,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:29,672 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-08 16:15:29,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:15:29,673 INFO L85 PathProgramCache]: Analyzing trace with hash -918919078, now seen corresponding path program 1 times [2024-11-08 16:15:29,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:15:29,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134900809] [2024-11-08 16:15:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:15:29,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:29,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:15:29,676 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:15:29,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 16:15:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:15:30,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 16:15:30,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:15:30,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 16:15:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:15:30,120 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:15:30,120 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 16:15:30,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134900809] [2024-11-08 16:15:30,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134900809] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:15:30,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:15:30,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:15:30,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152334391] [2024-11-08 16:15:30,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:15:30,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:15:30,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 16:15:30,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:15:30,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:15:30,412 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 150 [2024-11-08 16:15:30,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 133 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:30,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:15:30,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 150 [2024-11-08 16:15:30,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:15:30,802 INFO L124 PetriNetUnfolderBase]: 141/555 cut-off events. [2024-11-08 16:15:30,803 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-08 16:15:30,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 555 events. 141/555 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2886 event pairs, 100 based on Foata normal form. 2/464 useless extension candidates. Maximal degree in co-relation 833. Up to 261 conditions per place. [2024-11-08 16:15:30,807 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 45 selfloop transitions, 4 changer transitions 0/131 dead transitions. [2024-11-08 16:15:30,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 131 transitions, 415 flow [2024-11-08 16:15:30,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:15:30,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:15:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 403 transitions. [2024-11-08 16:15:30,810 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6716666666666666 [2024-11-08 16:15:30,810 INFO L175 Difference]: Start difference. First operand has 129 places, 133 transitions, 321 flow. Second operand 4 states and 403 transitions. [2024-11-08 16:15:30,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 131 transitions, 415 flow [2024-11-08 16:15:30,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 131 transitions, 401 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 16:15:30,815 INFO L231 Difference]: Finished difference. Result has 126 places, 131 transitions, 311 flow [2024-11-08 16:15:30,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=311, PETRI_PLACES=126, PETRI_TRANSITIONS=131} [2024-11-08 16:15:30,816 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, -3 predicate places. [2024-11-08 16:15:30,816 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 131 transitions, 311 flow [2024-11-08 16:15:30,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:30,817 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:15:30,817 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-08 16:15:30,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-08 16:15:31,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:31,021 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-08 16:15:31,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:15:31,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1579141469, now seen corresponding path program 1 times [2024-11-08 16:15:31,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:15:31,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876116188] [2024-11-08 16:15:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:15:31,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:31,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:15:31,024 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:15:31,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 16:15:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:15:31,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-08 16:15:31,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:15:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:15:31,297 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:15:31,297 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 16:15:31,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876116188] [2024-11-08 16:15:31,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876116188] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:15:31,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:15:31,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:15:31,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925361740] [2024-11-08 16:15:31,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:15:31,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:15:31,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 16:15:31,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:15:31,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:15:31,306 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 150 [2024-11-08 16:15:31,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 131 transitions, 311 flow. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:31,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:15:31,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 150 [2024-11-08 16:15:31,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:15:31,639 INFO L124 PetriNetUnfolderBase]: 139/572 cut-off events. [2024-11-08 16:15:31,639 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-08 16:15:31,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 572 events. 139/572 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2879 event pairs, 100 based on Foata normal form. 4/477 useless extension candidates. Maximal degree in co-relation 863. Up to 261 conditions per place. [2024-11-08 16:15:31,643 INFO L140 encePairwiseOnDemand]: 146/150 looper letters, 50 selfloop transitions, 3 changer transitions 0/135 dead transitions. [2024-11-08 16:15:31,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 135 transitions, 431 flow [2024-11-08 16:15:31,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:15:31,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:15:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 328 transitions. [2024-11-08 16:15:31,645 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7288888888888889 [2024-11-08 16:15:31,645 INFO L175 Difference]: Start difference. First operand has 126 places, 131 transitions, 311 flow. Second operand 3 states and 328 transitions. [2024-11-08 16:15:31,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 135 transitions, 431 flow [2024-11-08 16:15:31,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 135 transitions, 415 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-08 16:15:31,650 INFO L231 Difference]: Finished difference. Result has 126 places, 131 transitions, 314 flow [2024-11-08 16:15:31,650 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=314, PETRI_PLACES=126, PETRI_TRANSITIONS=131} [2024-11-08 16:15:31,651 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, -3 predicate places. [2024-11-08 16:15:31,651 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 131 transitions, 314 flow [2024-11-08 16:15:31,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:31,651 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:15:31,652 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:15:31,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 16:15:31,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:31,852 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-08 16:15:31,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:15:31,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1682055495, now seen corresponding path program 1 times [2024-11-08 16:15:31,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:15:31,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921751744] [2024-11-08 16:15:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:15:31,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:31,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:15:31,855 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:15:31,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 16:15:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:15:32,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 16:15:32,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:15:32,304 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2024-11-08 16:15:32,304 INFO L378 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 16 treesize of output 17 [2024-11-08 16:15:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:15:32,388 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:15:32,388 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 16:15:32,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921751744] [2024-11-08 16:15:32,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921751744] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:15:32,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:15:32,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:15:32,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384998087] [2024-11-08 16:15:32,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:15:32,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:15:32,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 16:15:32,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:15:32,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:15:33,227 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 150 [2024-11-08 16:15:33,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 131 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 88.5) internal successors, (531), 6 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:33,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:15:33,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 150 [2024-11-08 16:15:33,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:15:33,664 INFO L124 PetriNetUnfolderBase]: 134/513 cut-off events. [2024-11-08 16:15:33,664 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-08 16:15:33,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 513 events. 134/513 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2491 event pairs, 61 based on Foata normal form. 2/438 useless extension candidates. Maximal degree in co-relation 806. Up to 177 conditions per place. [2024-11-08 16:15:33,668 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 67 selfloop transitions, 5 changer transitions 0/151 dead transitions. [2024-11-08 16:15:33,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 151 transitions, 498 flow [2024-11-08 16:15:33,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:15:33,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:15:33,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 418 transitions. [2024-11-08 16:15:33,670 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6966666666666667 [2024-11-08 16:15:33,670 INFO L175 Difference]: Start difference. First operand has 126 places, 131 transitions, 314 flow. Second operand 4 states and 418 transitions. [2024-11-08 16:15:33,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 151 transitions, 498 flow [2024-11-08 16:15:33,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 151 transitions, 495 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 16:15:33,673 INFO L231 Difference]: Finished difference. Result has 126 places, 129 transitions, 317 flow [2024-11-08 16:15:33,674 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=317, PETRI_PLACES=126, PETRI_TRANSITIONS=129} [2024-11-08 16:15:33,674 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, -3 predicate places. [2024-11-08 16:15:33,674 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 129 transitions, 317 flow [2024-11-08 16:15:33,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 88.5) internal successors, (531), 6 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:33,675 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:15:33,675 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:15:33,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 16:15:33,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:33,876 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-08 16:15:33,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:15:33,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1682055496, now seen corresponding path program 1 times [2024-11-08 16:15:33,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:15:33,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382345435] [2024-11-08 16:15:33,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:15:33,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:33,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:15:33,878 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:15:33,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 16:15:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:15:34,183 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 16:15:34,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:15:34,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:15:34,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 16:15:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:15:34,448 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:15:34,448 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 16:15:34,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382345435] [2024-11-08 16:15:34,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382345435] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:15:34,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:15:34,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:15:34,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657734822] [2024-11-08 16:15:34,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:15:34,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:15:34,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 16:15:34,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:15:34,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:15:34,943 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 150 [2024-11-08 16:15:34,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 129 transitions, 317 flow. Second operand has 5 states, 5 states have (on average 88.4) internal successors, (442), 5 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:34,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:15:34,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 150 [2024-11-08 16:15:34,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:15:35,477 INFO L124 PetriNetUnfolderBase]: 140/585 cut-off events. [2024-11-08 16:15:35,478 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-11-08 16:15:35,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 585 events. 140/585 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3028 event pairs, 101 based on Foata normal form. 2/475 useless extension candidates. Maximal degree in co-relation 865. Up to 272 conditions per place. [2024-11-08 16:15:35,482 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 54 selfloop transitions, 5 changer transitions 0/136 dead transitions. [2024-11-08 16:15:35,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 136 transitions, 461 flow [2024-11-08 16:15:35,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:15:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:15:35,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 406 transitions. [2024-11-08 16:15:35,485 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6766666666666666 [2024-11-08 16:15:35,485 INFO L175 Difference]: Start difference. First operand has 126 places, 129 transitions, 317 flow. Second operand 4 states and 406 transitions. [2024-11-08 16:15:35,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 136 transitions, 461 flow [2024-11-08 16:15:35,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 136 transitions, 445 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:15:35,489 INFO L231 Difference]: Finished difference. Result has 128 places, 133 transitions, 349 flow [2024-11-08 16:15:35,490 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=349, PETRI_PLACES=128, PETRI_TRANSITIONS=133} [2024-11-08 16:15:35,492 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, -1 predicate places. [2024-11-08 16:15:35,494 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 133 transitions, 349 flow [2024-11-08 16:15:35,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 88.4) internal successors, (442), 5 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:35,495 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:15:35,495 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:15:35,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-08 16:15:35,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:35,696 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-08 16:15:35,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:15:35,696 INFO L85 PathProgramCache]: Analyzing trace with hash 604113710, now seen corresponding path program 1 times [2024-11-08 16:15:35,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:15:35,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066498870] [2024-11-08 16:15:35,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:15:35,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:35,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:15:35,699 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:15:35,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 16:15:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:15:36,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-08 16:15:36,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:15:36,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-08 16:15:36,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-08 16:15:36,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2024-11-08 16:15:36,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 18 [2024-11-08 16:15:36,621 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 16:15:36,621 INFO L378 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 13 [2024-11-08 16:15:36,657 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-08 16:15:36,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-08 16:15:36,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 16 [2024-11-08 16:15:36,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 16:15:36,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 16 [2024-11-08 16:15:36,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 16:15:36,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 16 [2024-11-08 16:15:36,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 16:15:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:15:37,070 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:15:37,071 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 16:15:37,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066498870] [2024-11-08 16:15:37,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066498870] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:15:37,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:15:37,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-08 16:15:37,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136322406] [2024-11-08 16:15:37,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:15:37,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 16:15:37,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 16:15:37,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 16:15:37,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-08 16:15:39,572 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 150 [2024-11-08 16:15:39,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 133 transitions, 349 flow. Second operand has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:39,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:15:39,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 150 [2024-11-08 16:15:39,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:15:40,682 INFO L124 PetriNetUnfolderBase]: 140/584 cut-off events. [2024-11-08 16:15:40,683 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-08 16:15:40,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 584 events. 140/584 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3023 event pairs, 101 based on Foata normal form. 0/487 useless extension candidates. Maximal degree in co-relation 877. Up to 285 conditions per place. [2024-11-08 16:15:40,686 INFO L140 encePairwiseOnDemand]: 138/150 looper letters, 69 selfloop transitions, 11 changer transitions 0/149 dead transitions. [2024-11-08 16:15:40,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 149 transitions, 547 flow [2024-11-08 16:15:40,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 16:15:40,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-08 16:15:40,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 872 transitions. [2024-11-08 16:15:40,690 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5284848484848484 [2024-11-08 16:15:40,690 INFO L175 Difference]: Start difference. First operand has 128 places, 133 transitions, 349 flow. Second operand 11 states and 872 transitions. [2024-11-08 16:15:40,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 149 transitions, 547 flow [2024-11-08 16:15:40,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 149 transitions, 545 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 16:15:40,695 INFO L231 Difference]: Finished difference. Result has 142 places, 138 transitions, 405 flow [2024-11-08 16:15:40,696 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=405, PETRI_PLACES=142, PETRI_TRANSITIONS=138} [2024-11-08 16:15:40,697 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 13 predicate places. [2024-11-08 16:15:40,697 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 138 transitions, 405 flow [2024-11-08 16:15:40,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:40,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:15:40,698 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:15:40,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-08 16:15:40,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:40,898 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-08 16:15:40,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:15:40,899 INFO L85 PathProgramCache]: Analyzing trace with hash 604113709, now seen corresponding path program 1 times [2024-11-08 16:15:40,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:15:40,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325310645] [2024-11-08 16:15:40,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:15:40,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:40,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:15:40,901 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:15:40,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 16:15:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:15:41,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-08 16:15:41,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:15:41,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-08 16:15:41,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2024-11-08 16:15:41,456 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-08 16:15:41,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-08 16:15:41,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 16:15:41,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 16:15:41,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 16:15:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:15:41,644 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:15:41,645 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 16:15:41,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325310645] [2024-11-08 16:15:41,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325310645] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:15:41,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:15:41,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-08 16:15:41,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702160538] [2024-11-08 16:15:41,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:15:41,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 16:15:41,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 16:15:41,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 16:15:41,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-08 16:15:43,883 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 150 [2024-11-08 16:15:43,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 138 transitions, 405 flow. Second operand has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:43,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:15:43,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 150 [2024-11-08 16:15:43,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:15:44,917 INFO L124 PetriNetUnfolderBase]: 142/600 cut-off events. [2024-11-08 16:15:44,917 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-11-08 16:15:44,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1019 conditions, 600 events. 142/600 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3134 event pairs, 101 based on Foata normal form. 1/509 useless extension candidates. Maximal degree in co-relation 938. Up to 281 conditions per place. [2024-11-08 16:15:44,921 INFO L140 encePairwiseOnDemand]: 138/150 looper letters, 67 selfloop transitions, 11 changer transitions 0/149 dead transitions. [2024-11-08 16:15:44,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 149 transitions, 591 flow [2024-11-08 16:15:44,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 16:15:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-08 16:15:44,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 892 transitions. [2024-11-08 16:15:44,925 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5406060606060606 [2024-11-08 16:15:44,925 INFO L175 Difference]: Start difference. First operand has 142 places, 138 transitions, 405 flow. Second operand 11 states and 892 transitions. [2024-11-08 16:15:44,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 149 transitions, 591 flow [2024-11-08 16:15:44,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 149 transitions, 587 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:15:44,930 INFO L231 Difference]: Finished difference. Result has 151 places, 138 transitions, 427 flow [2024-11-08 16:15:44,930 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=427, PETRI_PLACES=151, PETRI_TRANSITIONS=138} [2024-11-08 16:15:44,930 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 22 predicate places. [2024-11-08 16:15:44,931 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 138 transitions, 427 flow [2024-11-08 16:15:44,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:44,931 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:15:44,932 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:15:44,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 16:15:45,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:45,133 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-08 16:15:45,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:15:45,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1547656601, now seen corresponding path program 1 times [2024-11-08 16:15:45,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:15:45,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68727422] [2024-11-08 16:15:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:15:45,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:45,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:15:45,134 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:15:45,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 16:15:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:15:45,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 16:15:45,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:15:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:15:45,517 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:15:45,517 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 16:15:45,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68727422] [2024-11-08 16:15:45,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68727422] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:15:45,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:15:45,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:15:45,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947122215] [2024-11-08 16:15:45,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:15:45,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:15:45,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 16:15:45,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:15:45,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:15:45,794 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 150 [2024-11-08 16:15:45,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 138 transitions, 427 flow. Second operand has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:45,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:15:45,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 150 [2024-11-08 16:15:45,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:15:46,228 INFO L124 PetriNetUnfolderBase]: 139/573 cut-off events. [2024-11-08 16:15:46,228 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-11-08 16:15:46,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 991 conditions, 573 events. 139/573 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2956 event pairs, 100 based on Foata normal form. 0/486 useless extension candidates. Maximal degree in co-relation 915. Up to 262 conditions per place. [2024-11-08 16:15:46,232 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 48 selfloop transitions, 11 changer transitions 0/136 dead transitions. [2024-11-08 16:15:46,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 136 transitions, 541 flow [2024-11-08 16:15:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:15:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:15:46,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 484 transitions. [2024-11-08 16:15:46,234 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6453333333333333 [2024-11-08 16:15:46,234 INFO L175 Difference]: Start difference. First operand has 151 places, 138 transitions, 427 flow. Second operand 5 states and 484 transitions. [2024-11-08 16:15:46,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 136 transitions, 541 flow [2024-11-08 16:15:46,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 136 transitions, 519 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-08 16:15:46,238 INFO L231 Difference]: Finished difference. Result has 143 places, 136 transitions, 423 flow [2024-11-08 16:15:46,238 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=423, PETRI_PLACES=143, PETRI_TRANSITIONS=136} [2024-11-08 16:15:46,239 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 14 predicate places. [2024-11-08 16:15:46,239 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 136 transitions, 423 flow [2024-11-08 16:15:46,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:46,240 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:15:46,240 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:15:46,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-08 16:15:46,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:46,444 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-08 16:15:46,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:15:46,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1547656602, now seen corresponding path program 1 times [2024-11-08 16:15:46,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:15:46,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999862794] [2024-11-08 16:15:46,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:15:46,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:46,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:15:46,446 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:15:46,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 16:15:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:15:46,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 16:15:46,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:15:46,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 16:15:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:15:46,826 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:15:46,826 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 16:15:46,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999862794] [2024-11-08 16:15:46,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999862794] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:15:46,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:15:46,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:15:46,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374861582] [2024-11-08 16:15:46,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:15:46,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:15:46,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 16:15:46,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:15:46,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:15:47,104 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 150 [2024-11-08 16:15:47,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 136 transitions, 423 flow. Second operand has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:47,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:15:47,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 150 [2024-11-08 16:15:47,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:15:47,487 INFO L124 PetriNetUnfolderBase]: 139/565 cut-off events. [2024-11-08 16:15:47,487 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2024-11-08 16:15:47,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 565 events. 139/565 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2916 event pairs, 100 based on Foata normal form. 8/486 useless extension candidates. Maximal degree in co-relation 906. Up to 260 conditions per place. [2024-11-08 16:15:47,491 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 45 selfloop transitions, 9 changer transitions 0/134 dead transitions. [2024-11-08 16:15:47,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 134 transitions, 527 flow [2024-11-08 16:15:47,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:15:47,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:15:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 409 transitions. [2024-11-08 16:15:47,493 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6816666666666666 [2024-11-08 16:15:47,493 INFO L175 Difference]: Start difference. First operand has 143 places, 136 transitions, 423 flow. Second operand 4 states and 409 transitions. [2024-11-08 16:15:47,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 134 transitions, 527 flow [2024-11-08 16:15:47,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 134 transitions, 505 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 16:15:47,497 INFO L231 Difference]: Finished difference. Result has 140 places, 134 transitions, 415 flow [2024-11-08 16:15:47,497 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=415, PETRI_PLACES=140, PETRI_TRANSITIONS=134} [2024-11-08 16:15:47,498 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 11 predicate places. [2024-11-08 16:15:47,498 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 134 transitions, 415 flow [2024-11-08 16:15:47,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:47,499 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:15:47,499 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:15:47,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-08 16:15:47,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:47,699 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-08 16:15:47,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:15:47,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1358850629, now seen corresponding path program 1 times [2024-11-08 16:15:47,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:15:47,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225383099] [2024-11-08 16:15:47,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:15:47,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:47,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:15:47,702 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:15:47,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 16:15:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:15:48,019 INFO L255 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 16:15:48,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:15:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:15:48,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:15:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:15:48,093 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 16:15:48,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225383099] [2024-11-08 16:15:48,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225383099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:15:48,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 16:15:48,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-11-08 16:15:48,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775044213] [2024-11-08 16:15:48,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 16:15:48,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:15:48,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 16:15:48,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:15:48,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:15:48,106 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 150 [2024-11-08 16:15:48,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 134 transitions, 415 flow. Second operand has 6 states, 6 states have (on average 94.33333333333333) internal successors, (566), 6 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:48,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:15:48,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 150 [2024-11-08 16:15:48,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:15:48,643 INFO L124 PetriNetUnfolderBase]: 137/617 cut-off events. [2024-11-08 16:15:48,643 INFO L125 PetriNetUnfolderBase]: For 160/160 co-relation queries the response was YES. [2024-11-08 16:15:48,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 617 events. 137/617 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3057 event pairs, 100 based on Foata normal form. 12/538 useless extension candidates. Maximal degree in co-relation 1034. Up to 258 conditions per place. [2024-11-08 16:15:48,647 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 67 selfloop transitions, 11 changer transitions 0/155 dead transitions. [2024-11-08 16:15:48,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 155 transitions, 691 flow [2024-11-08 16:15:48,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:15:48,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 16:15:48,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 616 transitions. [2024-11-08 16:15:48,649 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6844444444444444 [2024-11-08 16:15:48,650 INFO L175 Difference]: Start difference. First operand has 140 places, 134 transitions, 415 flow. Second operand 6 states and 616 transitions. [2024-11-08 16:15:48,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 155 transitions, 691 flow [2024-11-08 16:15:48,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 155 transitions, 649 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:15:48,654 INFO L231 Difference]: Finished difference. Result has 146 places, 138 transitions, 471 flow [2024-11-08 16:15:48,654 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=471, PETRI_PLACES=146, PETRI_TRANSITIONS=138} [2024-11-08 16:15:48,655 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 17 predicate places. [2024-11-08 16:15:48,655 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 138 transitions, 471 flow [2024-11-08 16:15:48,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 94.33333333333333) internal successors, (566), 6 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:15:48,656 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:15:48,656 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:15:48,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-08 16:15:48,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:48,856 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-08 16:15:48,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:15:48,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1012778997, now seen corresponding path program 1 times [2024-11-08 16:15:48,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:15:48,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632540149] [2024-11-08 16:15:48,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:15:48,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:15:48,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:15:48,859 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:15:48,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 16:15:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:15:49,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-08 16:15:49,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:15:49,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2024-11-08 16:15:49,535 INFO L349 Elim1Store]: treesize reduction 90, result has 30.2 percent of original size [2024-11-08 16:15:49,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 52 [2024-11-08 16:15:49,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 29 [2024-11-08 16:15:49,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 29 [2024-11-08 16:15:49,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 28 treesize of output 21 [2024-11-08 16:15:49,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 16:15:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:15:49,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:15:50,125 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_new_~p~0#1.base_45| (_ BitVec 32)) (v_ArrVal_572 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_569 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (_ bv1 1) (select (store |c_#valid| |v_ULTIMATE.start_new_~p~0#1.base_45| v_ArrVal_569) (select (select (store |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_new_~p~0#1.base_45| v_ArrVal_572) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_new_~p~0#1.base_45|))))) is different from false [2024-11-08 16:15:50,168 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:15:50,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 29 treesize of output 30 [2024-11-08 16:15:50,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:15:50,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 55 [2024-11-08 16:15:50,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2024-11-08 16:16:00,806 INFO L349 Elim1Store]: treesize reduction 7, result has 96.7 percent of original size [2024-11-08 16:16:00,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 103 treesize of output 290 [2024-11-08 16:16:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:16:01,383 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 16:16:01,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632540149] [2024-11-08 16:16:01,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632540149] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:16:01,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 16:16:01,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2024-11-08 16:16:01,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092633592] [2024-11-08 16:16:01,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 16:16:01,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-08 16:16:01,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 16:16:01,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-08 16:16:01,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=253, Unknown=9, NotChecked=32, Total=342 [2024-11-08 16:16:02,776 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 150 [2024-11-08 16:16:02,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 138 transitions, 471 flow. Second operand has 19 states, 19 states have (on average 43.73684210526316) internal successors, (831), 19 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:16:02,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:16:02,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 150 [2024-11-08 16:16:02,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:16:05,641 INFO L124 PetriNetUnfolderBase]: 364/1122 cut-off events. [2024-11-08 16:16:05,641 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2024-11-08 16:16:05,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2131 conditions, 1122 events. 364/1122 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6760 event pairs, 302 based on Foata normal form. 6/876 useless extension candidates. Maximal degree in co-relation 2059. Up to 715 conditions per place. [2024-11-08 16:16:05,649 INFO L140 encePairwiseOnDemand]: 142/150 looper letters, 82 selfloop transitions, 25 changer transitions 0/149 dead transitions. [2024-11-08 16:16:05,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 149 transitions, 723 flow [2024-11-08 16:16:05,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 16:16:05,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 16:16:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 596 transitions. [2024-11-08 16:16:05,652 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33111111111111113 [2024-11-08 16:16:05,652 INFO L175 Difference]: Start difference. First operand has 146 places, 138 transitions, 471 flow. Second operand 12 states and 596 transitions. [2024-11-08 16:16:05,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 149 transitions, 723 flow [2024-11-08 16:16:05,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 149 transitions, 707 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-08 16:16:05,657 INFO L231 Difference]: Finished difference. Result has 158 places, 143 transitions, 540 flow [2024-11-08 16:16:05,658 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=540, PETRI_PLACES=158, PETRI_TRANSITIONS=143} [2024-11-08 16:16:05,658 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 29 predicate places. [2024-11-08 16:16:05,659 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 143 transitions, 540 flow [2024-11-08 16:16:05,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 43.73684210526316) internal successors, (831), 19 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:16:05,659 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:16:05,660 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:16:05,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-08 16:16:05,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:16:05,860 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-08 16:16:05,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:16:05,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1012778996, now seen corresponding path program 1 times [2024-11-08 16:16:05,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:16:05,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137843001] [2024-11-08 16:16:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:16:05,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:16:05,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:16:05,863 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:16:05,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-08 16:16:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:16:06,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-08 16:16:06,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:16:06,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 16:16:06,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2024-11-08 16:16:06,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2024-11-08 16:16:06,680 INFO L349 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2024-11-08 16:16:06,680 INFO L378 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 22 treesize of output 29 [2024-11-08 16:16:06,729 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2024-11-08 16:16:06,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2024-11-08 16:16:06,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 15 [2024-11-08 16:16:06,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 34 treesize of output 27 [2024-11-08 16:16:06,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 34 treesize of output 27 [2024-11-08 16:16:06,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-08 16:16:06,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 19 [2024-11-08 16:16:06,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 16:16:07,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-08 16:16:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:16:07,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:16:07,549 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_680 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_679) |c_~#c~0.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_680) |c_~#c~0.base|) .cse0)))) (forall ((v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_679) |c_~#c~0.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2024-11-08 16:16:07,629 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((|v_ULTIMATE.start_new_~p~0#1.base_47| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_new_~p~0#1.base_47|))) (forall ((v_ArrVal_680 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_674 (_ BitVec 32)) (v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_new_~p~0#1.base_47| v_ArrVal_679) |c_~#c~0.base|) .cse0)) (select (store |c_#length| |v_ULTIMATE.start_new_~p~0#1.base_47| v_ArrVal_674) (select (select (store |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_new_~p~0#1.base_47| v_ArrVal_680) |c_~#c~0.base|) .cse0)))))) (forall ((|v_ULTIMATE.start_new_~p~0#1.base_47| (_ BitVec 32))) (or (forall ((v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_new_~p~0#1.base_47| v_ArrVal_679) |c_~#c~0.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_new_~p~0#1.base_47|))))))) is different from false [2024-11-08 16:16:07,686 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:16:07,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 48 treesize of output 49 [2024-11-08 16:16:07,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:16:07,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 40 treesize of output 41 [2024-11-08 16:16:07,734 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:16:07,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 74 treesize of output 77 [2024-11-08 16:16:07,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:16:07,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 118 treesize of output 113 [2024-11-08 16:16:07,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2024-11-08 16:16:07,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2024-11-08 16:16:08,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:16:08,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 45 treesize of output 38 [2024-11-08 16:16:08,630 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:16:08,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 60 treesize of output 55 [2024-11-08 16:16:08,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-08 16:16:13,357 INFO L349 Elim1Store]: treesize reduction 10, result has 90.1 percent of original size [2024-11-08 16:16:13,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 156 [2024-11-08 16:16:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2024-11-08 16:16:17,052 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 16:16:17,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137843001] [2024-11-08 16:16:17,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137843001] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:16:17,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 16:16:17,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2024-11-08 16:16:17,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062584748] [2024-11-08 16:16:17,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 16:16:17,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-08 16:16:17,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 16:16:17,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-08 16:16:17,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=319, Unknown=12, NotChecked=74, Total=462 [2024-11-08 16:16:17,579 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 150 [2024-11-08 16:16:17,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 143 transitions, 540 flow. Second operand has 22 states, 22 states have (on average 33.59090909090909) internal successors, (739), 22 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:16:17,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:16:17,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 150 [2024-11-08 16:16:17,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:16:25,986 INFO L124 PetriNetUnfolderBase]: 506/1368 cut-off events. [2024-11-08 16:16:25,987 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2024-11-08 16:16:25,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2707 conditions, 1368 events. 506/1368 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8513 event pairs, 434 based on Foata normal form. 6/931 useless extension candidates. Maximal degree in co-relation 2626. Up to 997 conditions per place. [2024-11-08 16:16:25,995 INFO L140 encePairwiseOnDemand]: 140/150 looper letters, 89 selfloop transitions, 27 changer transitions 0/148 dead transitions. [2024-11-08 16:16:25,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 148 transitions, 786 flow [2024-11-08 16:16:25,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 16:16:25,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-08 16:16:25,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 549 transitions. [2024-11-08 16:16:25,999 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.26142857142857145 [2024-11-08 16:16:25,999 INFO L175 Difference]: Start difference. First operand has 158 places, 143 transitions, 540 flow. Second operand 14 states and 549 transitions. [2024-11-08 16:16:26,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 148 transitions, 786 flow [2024-11-08 16:16:26,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 148 transitions, 764 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-08 16:16:26,005 INFO L231 Difference]: Finished difference. Result has 170 places, 145 transitions, 586 flow [2024-11-08 16:16:26,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=586, PETRI_PLACES=170, PETRI_TRANSITIONS=145} [2024-11-08 16:16:26,006 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 41 predicate places. [2024-11-08 16:16:26,006 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 145 transitions, 586 flow [2024-11-08 16:16:26,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 33.59090909090909) internal successors, (739), 22 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:16:26,007 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:16:26,007 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-08 16:16:26,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-08 16:16:26,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:16:26,208 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-08 16:16:26,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:16:26,209 INFO L85 PathProgramCache]: Analyzing trace with hash 493504981, now seen corresponding path program 2 times [2024-11-08 16:16:26,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:16:26,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085785166] [2024-11-08 16:16:26,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:16:26,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:16:26,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:16:26,211 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:16:26,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-08 16:16:26,721 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:16:26,722 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:16:26,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 16:16:26,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:16:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:16:26,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:16:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:16:27,294 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 16:16:27,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085785166] [2024-11-08 16:16:27,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085785166] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:16:27,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 16:16:27,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-08 16:16:27,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245417837] [2024-11-08 16:16:27,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 16:16:27,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 16:16:27,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 16:16:27,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 16:16:27,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-08 16:16:27,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 150 [2024-11-08 16:16:27,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 145 transitions, 586 flow. Second operand has 12 states, 12 states have (on average 95.66666666666667) internal successors, (1148), 12 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:16:27,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:16:27,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 150 [2024-11-08 16:16:27,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:16:29,307 INFO L124 PetriNetUnfolderBase]: 137/737 cut-off events. [2024-11-08 16:16:29,308 INFO L125 PetriNetUnfolderBase]: For 576/576 co-relation queries the response was YES. [2024-11-08 16:16:29,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 737 events. 137/737 cut-off events. For 576/576 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3013 event pairs, 100 based on Foata normal form. 12/665 useless extension candidates. Maximal degree in co-relation 1591. Up to 258 conditions per place. [2024-11-08 16:16:29,313 INFO L140 encePairwiseOnDemand]: 146/150 looper letters, 103 selfloop transitions, 23 changer transitions 0/206 dead transitions. [2024-11-08 16:16:29,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 206 transitions, 1342 flow [2024-11-08 16:16:29,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 16:16:29,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 16:16:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1198 transitions. [2024-11-08 16:16:29,317 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6655555555555556 [2024-11-08 16:16:29,317 INFO L175 Difference]: Start difference. First operand has 170 places, 145 transitions, 586 flow. Second operand 12 states and 1198 transitions. [2024-11-08 16:16:29,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 206 transitions, 1342 flow [2024-11-08 16:16:29,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 206 transitions, 1188 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-11-08 16:16:29,325 INFO L231 Difference]: Finished difference. Result has 177 places, 158 transitions, 776 flow [2024-11-08 16:16:29,325 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=776, PETRI_PLACES=177, PETRI_TRANSITIONS=158} [2024-11-08 16:16:29,325 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 48 predicate places. [2024-11-08 16:16:29,326 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 158 transitions, 776 flow [2024-11-08 16:16:29,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 95.66666666666667) internal successors, (1148), 12 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:16:29,327 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:16:29,327 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-08 16:16:29,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-08 16:16:29,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:16:29,527 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-08 16:16:29,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:16:29,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2037994889, now seen corresponding path program 3 times [2024-11-08 16:16:29,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:16:29,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586890396] [2024-11-08 16:16:29,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:16:29,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:16:29,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:16:29,546 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:16:29,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce158b19-865b-48e6-81de-12e90421097d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process