./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 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_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx --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 a0270befea30c9963adb19613f3074c8c29d9100e1f0592dc0c89cf3d3dda0df --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:19:53,433 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:19:53,569 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:19:53,580 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:19:53,582 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:19:53,620 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:19:53,621 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:19:53,621 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:19:53,624 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:19:53,630 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:19:53,631 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:19:53,632 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:19:53,633 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:19:53,635 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:19:53,635 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:19:53,636 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:19:53,636 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:19:53,637 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:19:53,637 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:19:53,638 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:19:53,639 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:19:53,639 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:19:53,640 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:19:53,641 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:19:53,641 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:19:53,642 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:19:53,643 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:19:53,643 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:19:53,644 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:19:53,644 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:19:53,646 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:19:53,646 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:19:53,646 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:19:53,647 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:19:53,647 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:19:53,647 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:19:53,648 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:19:53,648 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:19:53,648 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:19:53,649 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_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0270befea30c9963adb19613f3074c8c29d9100e1f0592dc0c89cf3d3dda0df [2023-11-21 22:19:54,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:19:54,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:19:54,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:19:54,062 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:19:54,063 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:19:54,064 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i [2023-11-21 22:19:57,084 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:19:57,386 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:19:57,386 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i [2023-11-21 22:19:57,408 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/data/094abc073/440d01ad69ce4bfb8e61f6fe4658e3d3/FLAGd757e13c5 [2023-11-21 22:19:57,425 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/data/094abc073/440d01ad69ce4bfb8e61f6fe4658e3d3 [2023-11-21 22:19:57,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:19:57,430 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:19:57,432 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:19:57,432 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:19:57,438 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:19:57,439 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:19:57" (1/1) ... [2023-11-21 22:19:57,440 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c8054ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:57, skipping insertion in model container [2023-11-21 22:19:57,441 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:19:57" (1/1) ... [2023-11-21 22:19:57,495 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:19:58,115 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-21 22:19:58,116 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-21 22:19:58,117 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-21 22:19:58,117 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-21 22:19:58,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:19:58,212 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-21 22:19:58,213 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@35cc97c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:58, skipping insertion in model container [2023-11-21 22:19:58,213 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:19:58,214 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-21 22:19:58,216 INFO L158 Benchmark]: Toolchain (without parser) took 784.87ms. Allocated memory is still 121.6MB. Free memory was 75.0MB in the beginning and 59.1MB in the end (delta: 15.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-21 22:19:58,217 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 121.6MB. Free memory is still 94.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 22:19:58,218 INFO L158 Benchmark]: CACSL2BoogieTranslator took 781.91ms. Allocated memory is still 121.6MB. Free memory was 74.7MB in the beginning and 59.1MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-21 22:19:58,220 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 121.6MB. Free memory is still 94.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 781.91ms. Allocated memory is still 121.6MB. Free memory was 74.7MB in the beginning and 59.1MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1038]: 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_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx --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 a0270befea30c9963adb19613f3074c8c29d9100e1f0592dc0c89cf3d3dda0df --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:20:00,716 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:20:00,879 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-21 22:20:00,889 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:20:00,890 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:20:00,943 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:20:00,944 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:20:00,945 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:20:00,947 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:20:00,953 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:20:00,954 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:20:00,954 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:20:00,955 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:20:00,957 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:20:00,958 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:20:00,959 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:20:00,959 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:20:00,960 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:20:00,961 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:20:00,962 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:20:00,963 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:20:00,964 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:20:00,964 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:20:00,965 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-21 22:20:00,965 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-21 22:20:00,966 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:20:00,967 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:20:00,967 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:20:00,968 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:20:00,969 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:20:00,970 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:20:00,971 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:20:00,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:20:00,972 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:20:00,972 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:20:00,973 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-21 22:20:00,973 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-21 22:20:00,973 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:20:00,974 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:20:00,975 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:20:00,975 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:20:00,976 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-21 22:20:00,976 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_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0270befea30c9963adb19613f3074c8c29d9100e1f0592dc0c89cf3d3dda0df [2023-11-21 22:20:01,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:20:01,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:20:01,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:20:01,485 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:20:01,485 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:20:01,487 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i [2023-11-21 22:20:04,849 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:20:05,293 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:20:05,294 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i [2023-11-21 22:20:05,315 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/data/5bc9613bf/95217584f6a04ac5bbf11667710d97a8/FLAG2729b25bf [2023-11-21 22:20:05,332 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/data/5bc9613bf/95217584f6a04ac5bbf11667710d97a8 [2023-11-21 22:20:05,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:20:05,336 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:20:05,338 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:20:05,338 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:20:05,344 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:20:05,345 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:20:05" (1/1) ... [2023-11-21 22:20:05,347 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34323796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:05, skipping insertion in model container [2023-11-21 22:20:05,347 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:20:05" (1/1) ... [2023-11-21 22:20:05,406 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:20:06,094 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-21 22:20:06,095 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-21 22:20:06,096 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-21 22:20:06,098 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-21 22:20:06,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:20:06,188 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-21 22:20:06,205 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:20:06,258 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-21 22:20:06,282 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-21 22:20:06,283 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-21 22:20:06,283 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-21 22:20:06,299 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:20:06,316 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:20:06,368 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-21 22:20:06,369 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-21 22:20:06,369 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-21 22:20:06,370 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-21 22:20:06,380 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:20:06,463 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:20:06,464 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:06 WrapperNode [2023-11-21 22:20:06,464 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:20:06,465 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:20:06,465 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:20:06,466 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:20:06,474 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:06" (1/1) ... [2023-11-21 22:20:06,499 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:06" (1/1) ... [2023-11-21 22:20:06,531 INFO L138 Inliner]: procedures = 276, calls = 36, calls flagged for inlining = 9, calls inlined = 8, statements flattened = 132 [2023-11-21 22:20:06,531 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:20:06,532 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:20:06,532 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:20:06,532 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:20:06,542 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:06" (1/1) ... [2023-11-21 22:20:06,542 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:06" (1/1) ... [2023-11-21 22:20:06,547 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:06" (1/1) ... [2023-11-21 22:20:06,547 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:06" (1/1) ... [2023-11-21 22:20:06,563 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:06" (1/1) ... [2023-11-21 22:20:06,582 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:06" (1/1) ... [2023-11-21 22:20:06,586 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:06" (1/1) ... [2023-11-21 22:20:06,599 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:06" (1/1) ... [2023-11-21 22:20:06,604 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:20:06,605 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:20:06,605 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:20:06,605 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:20:06,606 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:06" (1/1) ... [2023-11-21 22:20:06,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:20:06,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:20:06,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:20:06,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:20:06,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-21 22:20:06,729 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-21 22:20:06,730 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-21 22:20:06,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:20:06,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 22:20:06,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:20:06,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-21 22:20:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-21 22:20:06,733 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-21 22:20:06,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:20:06,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:20:06,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 22:20:06,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:20:06,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:20:06,737 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 22:20:06,916 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:20:06,919 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:20:07,679 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:20:07,911 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:20:07,911 INFO L308 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-21 22:20:07,913 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:20:07 BoogieIcfgContainer [2023-11-21 22:20:07,913 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:20:07,915 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:20:07,916 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:20:07,919 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:20:07,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:20:05" (1/3) ... [2023-11-21 22:20:07,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fdc408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:20:07, skipping insertion in model container [2023-11-21 22:20:07,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:06" (2/3) ... [2023-11-21 22:20:07,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fdc408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:20:07, skipping insertion in model container [2023-11-21 22:20:07,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:20:07" (3/3) ... [2023-11-21 22:20:07,922 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_22-nocollapse.i [2023-11-21 22:20:07,942 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:20:07,942 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2023-11-21 22:20:07,942 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 22:20:08,041 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:20:08,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 91 transitions, 190 flow [2023-11-21 22:20:08,150 INFO L124 PetriNetUnfolderBase]: 6/89 cut-off events. [2023-11-21 22:20:08,150 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:20:08,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 89 events. 6/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 330 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2023-11-21 22:20:08,159 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 91 transitions, 190 flow [2023-11-21 22:20:08,167 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 89 transitions, 184 flow [2023-11-21 22:20:08,180 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:20:08,187 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@64049a0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:20:08,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2023-11-21 22:20:08,192 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:20:08,193 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-21 22:20:08,193 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:20:08,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:08,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:20:08,195 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-21 22:20:08,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:08,201 INFO L85 PathProgramCache]: Analyzing trace with hash 415195, now seen corresponding path program 1 times [2023-11-21 22:20:08,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:08,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346662441] [2023-11-21 22:20:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:08,220 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:08,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:08,251 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:20:08,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-21 22:20:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:08,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:20:08,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:08,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:08,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:08,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-21 22:20:08,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:08,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-21 22:20:08,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:08,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:20:08,582 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:08,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346662441] [2023-11-21 22:20:08,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346662441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:08,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:08,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:20:08,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26924735] [2023-11-21 22:20:08,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:08,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:20:08,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:08,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:20:08,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:20:08,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 91 [2023-11-21 22:20:08,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:08,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:08,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 91 [2023-11-21 22:20:08,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:09,566 INFO L124 PetriNetUnfolderBase]: 543/1066 cut-off events. [2023-11-21 22:20:09,566 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-21 22:20:09,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1942 conditions, 1066 events. 543/1066 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6055 event pairs, 101 based on Foata normal form. 1/968 useless extension candidates. Maximal degree in co-relation 1886. Up to 622 conditions per place. [2023-11-21 22:20:09,586 INFO L140 encePairwiseOnDemand]: 83/91 looper letters, 55 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2023-11-21 22:20:09,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 107 transitions, 338 flow [2023-11-21 22:20:09,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:20:09,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:20:09,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 263 transitions. [2023-11-21 22:20:09,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7225274725274725 [2023-11-21 22:20:09,602 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 263 transitions. [2023-11-21 22:20:09,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 263 transitions. [2023-11-21 22:20:09,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:09,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 263 transitions. [2023-11-21 22:20:09,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:09,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:09,616 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:09,618 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 184 flow. Second operand 4 states and 263 transitions. [2023-11-21 22:20:09,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 107 transitions, 338 flow [2023-11-21 22:20:09,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 107 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:20:09,626 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 194 flow [2023-11-21 22:20:09,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2023-11-21 22:20:09,632 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 0 predicate places. [2023-11-21 22:20:09,632 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 194 flow [2023-11-21 22:20:09,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:09,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:09,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:20:09,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:09,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:09,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-21 22:20:09,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:09,837 INFO L85 PathProgramCache]: Analyzing trace with hash 415196, now seen corresponding path program 1 times [2023-11-21 22:20:09,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:09,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363680382] [2023-11-21 22:20:09,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:09,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:09,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:09,840 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:20:09,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-21 22:20:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:09,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 22:20:09,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:09,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:10,001 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 [2023-11-21 22:20:10,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:10,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:10,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-21 22:20:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:10,125 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:20:10,125 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:10,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363680382] [2023-11-21 22:20:10,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363680382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:10,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:10,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:20:10,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96025497] [2023-11-21 22:20:10,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:10,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:20:10,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:10,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:20:10,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:20:10,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 91 [2023-11-21 22:20:10,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:10,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:10,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 91 [2023-11-21 22:20:10,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:11,092 INFO L124 PetriNetUnfolderBase]: 484/994 cut-off events. [2023-11-21 22:20:11,093 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2023-11-21 22:20:11,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1959 conditions, 994 events. 484/994 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5377 event pairs, 369 based on Foata normal form. 3/889 useless extension candidates. Maximal degree in co-relation 1885. Up to 757 conditions per place. [2023-11-21 22:20:11,105 INFO L140 encePairwiseOnDemand]: 83/91 looper letters, 38 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2023-11-21 22:20:11,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 91 transitions, 294 flow [2023-11-21 22:20:11,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:20:11,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:20:11,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 254 transitions. [2023-11-21 22:20:11,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6978021978021978 [2023-11-21 22:20:11,110 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 254 transitions. [2023-11-21 22:20:11,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 254 transitions. [2023-11-21 22:20:11,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:11,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 254 transitions. [2023-11-21 22:20:11,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:11,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:11,116 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:11,116 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 194 flow. Second operand 4 states and 254 transitions. [2023-11-21 22:20:11,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 91 transitions, 294 flow [2023-11-21 22:20:11,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 282 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 22:20:11,121 INFO L231 Difference]: Finished difference. Result has 92 places, 91 transitions, 227 flow [2023-11-21 22:20:11,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=92, PETRI_TRANSITIONS=91} [2023-11-21 22:20:11,122 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2023-11-21 22:20:11,123 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 91 transitions, 227 flow [2023-11-21 22:20:11,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:11,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:11,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 22:20:11,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-21 22:20:11,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:11,326 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-21 22:20:11,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:11,327 INFO L85 PathProgramCache]: Analyzing trace with hash -515465405, now seen corresponding path program 1 times [2023-11-21 22:20:11,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:11,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282296877] [2023-11-21 22:20:11,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:11,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:11,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:11,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:20:11,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-21 22:20:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:11,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:20:11,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:11,454 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 [2023-11-21 22:20:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:11,469 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:20:11,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:11,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282296877] [2023-11-21 22:20:11,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282296877] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:11,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:11,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:20:11,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184301014] [2023-11-21 22:20:11,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:11,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:20:11,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:11,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:20:11,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:20:11,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 91 [2023-11-21 22:20:11,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 91 transitions, 227 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:11,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:11,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 91 [2023-11-21 22:20:11,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:12,081 INFO L124 PetriNetUnfolderBase]: 484/993 cut-off events. [2023-11-21 22:20:12,081 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-21 22:20:12,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1886 conditions, 993 events. 484/993 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5381 event pairs, 369 based on Foata normal form. 0/884 useless extension candidates. Maximal degree in co-relation 1854. Up to 753 conditions per place. [2023-11-21 22:20:12,090 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 36 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2023-11-21 22:20:12,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 90 transitions, 303 flow [2023-11-21 22:20:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:20:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:20:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2023-11-21 22:20:12,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7362637362637363 [2023-11-21 22:20:12,094 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2023-11-21 22:20:12,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2023-11-21 22:20:12,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:12,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2023-11-21 22:20:12,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:12,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:12,098 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:12,098 INFO L175 Difference]: Start difference. First operand has 92 places, 91 transitions, 227 flow. Second operand 3 states and 201 transitions. [2023-11-21 22:20:12,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 90 transitions, 303 flow [2023-11-21 22:20:12,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 90 transitions, 300 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:20:12,102 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 228 flow [2023-11-21 22:20:12,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2023-11-21 22:20:12,103 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2023-11-21 22:20:12,103 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 228 flow [2023-11-21 22:20:12,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:12,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:12,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 22:20:12,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:12,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:12,308 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-21 22:20:12,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:12,309 INFO L85 PathProgramCache]: Analyzing trace with hash -515465406, now seen corresponding path program 1 times [2023-11-21 22:20:12,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:12,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340610999] [2023-11-21 22:20:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:12,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:12,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:12,311 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:20:12,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-21 22:20:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:12,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:20:12,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:12,429 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 [2023-11-21 22:20:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:12,435 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:20:12,436 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:12,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340610999] [2023-11-21 22:20:12,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340610999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:12,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:12,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:20:12,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360901747] [2023-11-21 22:20:12,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:12,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:20:12,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:12,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:20:12,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:20:12,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 91 [2023-11-21 22:20:12,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:12,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:12,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 91 [2023-11-21 22:20:12,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:12,942 INFO L124 PetriNetUnfolderBase]: 484/992 cut-off events. [2023-11-21 22:20:12,942 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-21 22:20:12,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1886 conditions, 992 events. 484/992 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5403 event pairs, 369 based on Foata normal form. 0/885 useless extension candidates. Maximal degree in co-relation 1853. Up to 753 conditions per place. [2023-11-21 22:20:12,951 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 36 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2023-11-21 22:20:12,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 89 transitions, 304 flow [2023-11-21 22:20:12,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:20:12,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:20:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2023-11-21 22:20:12,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7362637362637363 [2023-11-21 22:20:12,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2023-11-21 22:20:12,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2023-11-21 22:20:12,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:12,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2023-11-21 22:20:12,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:12,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:12,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:12,963 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 228 flow. Second operand 3 states and 201 transitions. [2023-11-21 22:20:12,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 89 transitions, 304 flow [2023-11-21 22:20:12,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 89 transitions, 298 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:20:12,967 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 226 flow [2023-11-21 22:20:12,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2023-11-21 22:20:12,969 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 1 predicate places. [2023-11-21 22:20:12,969 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 226 flow [2023-11-21 22:20:12,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:12,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:12,970 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-21 22:20:12,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-21 22:20:13,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:13,173 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-21 22:20:13,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:13,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1200443502, now seen corresponding path program 1 times [2023-11-21 22:20:13,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:13,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506530322] [2023-11-21 22:20:13,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:13,175 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:13,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:13,176 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:20:13,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-21 22:20:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:13,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:20:13,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:13,297 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:20:13,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:13,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506530322] [2023-11-21 22:20:13,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506530322] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:13,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:13,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:20:13,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654831391] [2023-11-21 22:20:13,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:13,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:20:13,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:13,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:20:13,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:20:13,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 91 [2023-11-21 22:20:13,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:13,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:13,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 91 [2023-11-21 22:20:13,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:13,697 INFO L124 PetriNetUnfolderBase]: 483/1014 cut-off events. [2023-11-21 22:20:13,697 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-21 22:20:13,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1914 conditions, 1014 events. 483/1014 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5421 event pairs, 369 based on Foata normal form. 2/898 useless extension candidates. Maximal degree in co-relation 1884. Up to 753 conditions per place. [2023-11-21 22:20:13,706 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 40 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2023-11-21 22:20:13,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 324 flow [2023-11-21 22:20:13,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:20:13,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:20:13,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 209 transitions. [2023-11-21 22:20:13,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7655677655677655 [2023-11-21 22:20:13,709 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 209 transitions. [2023-11-21 22:20:13,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 209 transitions. [2023-11-21 22:20:13,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:13,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 209 transitions. [2023-11-21 22:20:13,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:13,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:13,712 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:13,712 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 226 flow. Second operand 3 states and 209 transitions. [2023-11-21 22:20:13,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 324 flow [2023-11-21 22:20:13,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 93 transitions, 314 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:20:13,716 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 231 flow [2023-11-21 22:20:13,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=231, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2023-11-21 22:20:13,717 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2023-11-21 22:20:13,718 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 231 flow [2023-11-21 22:20:13,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:13,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:13,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:13,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-21 22:20:13,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:13,921 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-21 22:20:13,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:13,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1200442016, now seen corresponding path program 1 times [2023-11-21 22:20:13,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:13,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628430562] [2023-11-21 22:20:13,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:13,922 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:13,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:13,925 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:20:13,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-21 22:20:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:14,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 22:20:14,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:14,063 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 [2023-11-21 22:20:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:14,107 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:20:14,107 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:14,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628430562] [2023-11-21 22:20:14,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628430562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:14,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:14,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:20:14,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846518358] [2023-11-21 22:20:14,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:14,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:20:14,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:14,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:20:14,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:20:14,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 91 [2023-11-21 22:20:14,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 231 flow. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:14,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:14,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 91 [2023-11-21 22:20:14,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:14,950 INFO L124 PetriNetUnfolderBase]: 483/1010 cut-off events. [2023-11-21 22:20:14,950 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-11-21 22:20:14,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1914 conditions, 1010 events. 483/1010 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5392 event pairs, 369 based on Foata normal form. 2/898 useless extension candidates. Maximal degree in co-relation 1880. Up to 757 conditions per place. [2023-11-21 22:20:14,960 INFO L140 encePairwiseOnDemand]: 86/91 looper letters, 37 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-11-21 22:20:14,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 87 transitions, 309 flow [2023-11-21 22:20:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:20:14,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:20:14,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 243 transitions. [2023-11-21 22:20:14,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6675824175824175 [2023-11-21 22:20:14,963 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 243 transitions. [2023-11-21 22:20:14,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 243 transitions. [2023-11-21 22:20:14,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:14,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 243 transitions. [2023-11-21 22:20:14,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:14,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:14,967 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:14,967 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 231 flow. Second operand 4 states and 243 transitions. [2023-11-21 22:20:14,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 87 transitions, 309 flow [2023-11-21 22:20:14,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 87 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:20:14,971 INFO L231 Difference]: Finished difference. Result has 92 places, 87 transitions, 232 flow [2023-11-21 22:20:14,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2023-11-21 22:20:14,972 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2023-11-21 22:20:14,973 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 232 flow [2023-11-21 22:20:14,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:14,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:14,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:14,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:15,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:15,177 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-21 22:20:15,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:15,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1200442015, now seen corresponding path program 1 times [2023-11-21 22:20:15,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:15,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087316278] [2023-11-21 22:20:15,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:15,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:15,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:15,179 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:20:15,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-21 22:20:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:15,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 22:20:15,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:15,315 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 [2023-11-21 22:20:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:15,341 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:20:15,342 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:15,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087316278] [2023-11-21 22:20:15,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087316278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:15,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:15,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:20:15,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313342128] [2023-11-21 22:20:15,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:15,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:20:15,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:15,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:20:15,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:20:15,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 91 [2023-11-21 22:20:15,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:15,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:15,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 91 [2023-11-21 22:20:15,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:16,054 INFO L124 PetriNetUnfolderBase]: 483/1006 cut-off events. [2023-11-21 22:20:16,054 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-21 22:20:16,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1918 conditions, 1006 events. 483/1006 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5394 event pairs, 369 based on Foata normal form. 2/896 useless extension candidates. Maximal degree in co-relation 1884. Up to 755 conditions per place. [2023-11-21 22:20:16,063 INFO L140 encePairwiseOnDemand]: 84/91 looper letters, 34 selfloop transitions, 7 changer transitions 0/85 dead transitions. [2023-11-21 22:20:16,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 85 transitions, 310 flow [2023-11-21 22:20:16,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:20:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:20:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 284 transitions. [2023-11-21 22:20:16,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6241758241758242 [2023-11-21 22:20:16,066 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 284 transitions. [2023-11-21 22:20:16,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 284 transitions. [2023-11-21 22:20:16,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:16,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 284 transitions. [2023-11-21 22:20:16,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 56.8) internal successors, (284), 5 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) [2023-11-21 22:20:16,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:16,070 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:16,070 INFO L175 Difference]: Start difference. First operand has 92 places, 87 transitions, 232 flow. Second operand 5 states and 284 transitions. [2023-11-21 22:20:16,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 85 transitions, 310 flow [2023-11-21 22:20:16,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 85 transitions, 302 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 22:20:16,077 INFO L231 Difference]: Finished difference. Result has 91 places, 85 transitions, 234 flow [2023-11-21 22:20:16,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=234, PETRI_PLACES=91, PETRI_TRANSITIONS=85} [2023-11-21 22:20:16,078 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 1 predicate places. [2023-11-21 22:20:16,079 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 85 transitions, 234 flow [2023-11-21 22:20:16,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:16,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:16,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:16,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:16,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:16,282 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-21 22:20:16,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:16,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1721415487, now seen corresponding path program 1 times [2023-11-21 22:20:16,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:16,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542482505] [2023-11-21 22:20:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:16,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:16,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:16,285 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:20:16,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-21 22:20:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:16,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 22:20:16,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:16,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 22:20:16,633 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 22:20:16,633 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-21 22:20:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:16,779 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:20:16,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:16,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542482505] [2023-11-21 22:20:16,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542482505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:16,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:16,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:20:16,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135986990] [2023-11-21 22:20:16,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:16,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:20:16,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:16,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:20:16,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:20:17,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 91 [2023-11-21 22:20:17,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 85 transitions, 234 flow. Second operand has 7 states, 7 states have (on average 50.285714285714285) internal successors, (352), 7 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:17,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:17,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 91 [2023-11-21 22:20:17,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:18,118 INFO L124 PetriNetUnfolderBase]: 839/1787 cut-off events. [2023-11-21 22:20:18,118 INFO L125 PetriNetUnfolderBase]: For 77/86 co-relation queries the response was YES. [2023-11-21 22:20:18,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3317 conditions, 1787 events. 839/1787 cut-off events. For 77/86 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11897 event pairs, 230 based on Foata normal form. 49/1694 useless extension candidates. Maximal degree in co-relation 3280. Up to 754 conditions per place. [2023-11-21 22:20:18,133 INFO L140 encePairwiseOnDemand]: 78/91 looper letters, 51 selfloop transitions, 13 changer transitions 0/104 dead transitions. [2023-11-21 22:20:18,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 104 transitions, 400 flow [2023-11-21 22:20:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:20:18,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 22:20:18,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 407 transitions. [2023-11-21 22:20:18,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6389324960753532 [2023-11-21 22:20:18,136 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 407 transitions. [2023-11-21 22:20:18,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 407 transitions. [2023-11-21 22:20:18,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:18,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 407 transitions. [2023-11-21 22:20:18,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:18,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 91.0) internal successors, (728), 8 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:18,140 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 91.0) internal successors, (728), 8 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:18,141 INFO L175 Difference]: Start difference. First operand has 91 places, 85 transitions, 234 flow. Second operand 7 states and 407 transitions. [2023-11-21 22:20:18,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 104 transitions, 400 flow [2023-11-21 22:20:18,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 104 transitions, 386 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-21 22:20:18,145 INFO L231 Difference]: Finished difference. Result has 93 places, 85 transitions, 269 flow [2023-11-21 22:20:18,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=269, PETRI_PLACES=93, PETRI_TRANSITIONS=85} [2023-11-21 22:20:18,148 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 3 predicate places. [2023-11-21 22:20:18,149 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 85 transitions, 269 flow [2023-11-21 22:20:18,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 50.285714285714285) internal successors, (352), 7 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:18,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:18,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:18,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:18,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:18,355 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-21 22:20:18,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:18,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1721415486, now seen corresponding path program 1 times [2023-11-21 22:20:18,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:18,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [718062307] [2023-11-21 22:20:18,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:18,356 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:18,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:18,358 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:20:18,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-21 22:20:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:18,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-21 22:20:18,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:18,757 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-21 22:20:18,758 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 [2023-11-21 22:20:18,782 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-21 22:20:18,782 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 [2023-11-21 22:20:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:18,900 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:20:18,901 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:18,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [718062307] [2023-11-21 22:20:18,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [718062307] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:18,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:18,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 22:20:18,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86540284] [2023-11-21 22:20:18,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:18,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 22:20:18,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:18,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 22:20:18,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:20:20,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 91 [2023-11-21 22:20:20,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 85 transitions, 269 flow. Second operand has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:20,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:20,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 91 [2023-11-21 22:20:20,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:21,175 INFO L124 PetriNetUnfolderBase]: 840/1864 cut-off events. [2023-11-21 22:20:21,175 INFO L125 PetriNetUnfolderBase]: For 527/552 co-relation queries the response was YES. [2023-11-21 22:20:21,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3771 conditions, 1864 events. 840/1864 cut-off events. For 527/552 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12681 event pairs, 606 based on Foata normal form. 2/1656 useless extension candidates. Maximal degree in co-relation 3668. Up to 1351 conditions per place. [2023-11-21 22:20:21,194 INFO L140 encePairwiseOnDemand]: 82/91 looper letters, 47 selfloop transitions, 9 changer transitions 0/94 dead transitions. [2023-11-21 22:20:21,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 94 transitions, 420 flow [2023-11-21 22:20:21,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:20:21,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 22:20:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 323 transitions. [2023-11-21 22:20:21,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5915750915750916 [2023-11-21 22:20:21,198 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 323 transitions. [2023-11-21 22:20:21,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 323 transitions. [2023-11-21 22:20:21,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:21,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 323 transitions. [2023-11-21 22:20:21,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 53.833333333333336) internal successors, (323), 6 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:21,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:21,202 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:21,202 INFO L175 Difference]: Start difference. First operand has 93 places, 85 transitions, 269 flow. Second operand 6 states and 323 transitions. [2023-11-21 22:20:21,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 94 transitions, 420 flow [2023-11-21 22:20:21,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 94 transitions, 389 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-21 22:20:21,207 INFO L231 Difference]: Finished difference. Result has 96 places, 90 transitions, 315 flow [2023-11-21 22:20:21,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=315, PETRI_PLACES=96, PETRI_TRANSITIONS=90} [2023-11-21 22:20:21,209 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 6 predicate places. [2023-11-21 22:20:21,209 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 90 transitions, 315 flow [2023-11-21 22:20:21,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:21,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:21,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:21,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:21,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:21,415 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-21 22:20:21,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:21,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1824272065, now seen corresponding path program 1 times [2023-11-21 22:20:21,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:21,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127169677] [2023-11-21 22:20:21,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:21,417 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:21,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:21,419 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:20:21,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-21 22:20:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:21,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-21 22:20:21,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:21,776 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 [2023-11-21 22:20:21,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 28 treesize of output 27 [2023-11-21 22:20:21,920 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-21 22:20:21,920 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 [2023-11-21 22:20:22,017 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 32 treesize of output 25 [2023-11-21 22:20:22,114 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 32 treesize of output 25 [2023-11-21 22:20:22,157 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 25 treesize of output 18 [2023-11-21 22:20:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:22,261 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:20:22,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:22,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127169677] [2023-11-21 22:20:22,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127169677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:22,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:22,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 22:20:22,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408718744] [2023-11-21 22:20:22,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:22,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:20:22,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:22,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:20:22,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:20:23,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 91 [2023-11-21 22:20:23,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 90 transitions, 315 flow. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:23,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:23,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 91 [2023-11-21 22:20:23,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:25,574 INFO L124 PetriNetUnfolderBase]: 850/1874 cut-off events. [2023-11-21 22:20:25,575 INFO L125 PetriNetUnfolderBase]: For 366/386 co-relation queries the response was YES. [2023-11-21 22:20:25,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3787 conditions, 1874 events. 850/1874 cut-off events. For 366/386 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12743 event pairs, 614 based on Foata normal form. 0/1683 useless extension candidates. Maximal degree in co-relation 3683. Up to 1374 conditions per place. [2023-11-21 22:20:25,598 INFO L140 encePairwiseOnDemand]: 80/91 looper letters, 50 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2023-11-21 22:20:25,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 99 transitions, 474 flow [2023-11-21 22:20:25,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:20:25,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-21 22:20:25,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 506 transitions. [2023-11-21 22:20:25,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054945054945055 [2023-11-21 22:20:25,602 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 506 transitions. [2023-11-21 22:20:25,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 506 transitions. [2023-11-21 22:20:25,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:25,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 506 transitions. [2023-11-21 22:20:25,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 46.0) internal successors, (506), 11 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:25,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 91.0) internal successors, (1092), 12 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:25,609 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 91.0) internal successors, (1092), 12 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:25,610 INFO L175 Difference]: Start difference. First operand has 96 places, 90 transitions, 315 flow. Second operand 11 states and 506 transitions. [2023-11-21 22:20:25,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 99 transitions, 474 flow [2023-11-21 22:20:25,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 99 transitions, 470 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:20:25,614 INFO L231 Difference]: Finished difference. Result has 109 places, 96 transitions, 393 flow [2023-11-21 22:20:25,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=393, PETRI_PLACES=109, PETRI_TRANSITIONS=96} [2023-11-21 22:20:25,615 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 19 predicate places. [2023-11-21 22:20:25,616 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 96 transitions, 393 flow [2023-11-21 22:20:25,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:25,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:25,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:25,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:25,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:25,821 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-21 22:20:25,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:25,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1824272064, now seen corresponding path program 1 times [2023-11-21 22:20:25,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:25,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105278437] [2023-11-21 22:20:25,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:25,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:25,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:25,824 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:20:25,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-21 22:20:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:26,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-21 22:20:26,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:26,197 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 [2023-11-21 22:20:26,207 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 [2023-11-21 22:20:26,307 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 [2023-11-21 22:20:26,330 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 [2023-11-21 22:20:26,453 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-21 22:20:26,454 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 [2023-11-21 22:20:26,500 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-21 22:20:26,500 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 [2023-11-21 22:20:26,622 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 [2023-11-21 22:20:26,641 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 [2023-11-21 22:20:26,759 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 [2023-11-21 22:20:26,776 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 [2023-11-21 22:20:26,848 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 [2023-11-21 22:20:26,864 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 [2023-11-21 22:20:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:26,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:20:26,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:26,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105278437] [2023-11-21 22:20:26,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105278437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:26,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:26,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 22:20:26,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202928389] [2023-11-21 22:20:26,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:26,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:20:26,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:26,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:20:26,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:20:29,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 91 [2023-11-21 22:20:29,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 96 transitions, 393 flow. Second operand has 10 states, 10 states have (on average 40.0) internal successors, (400), 10 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:29,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:29,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 91 [2023-11-21 22:20:29,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:30,855 INFO L124 PetriNetUnfolderBase]: 850/1873 cut-off events. [2023-11-21 22:20:30,855 INFO L125 PetriNetUnfolderBase]: For 393/413 co-relation queries the response was YES. [2023-11-21 22:20:30,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3834 conditions, 1873 events. 850/1873 cut-off events. For 393/413 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12729 event pairs, 614 based on Foata normal form. 1/1686 useless extension candidates. Maximal degree in co-relation 3690. Up to 1379 conditions per place. [2023-11-21 22:20:30,875 INFO L140 encePairwiseOnDemand]: 79/91 looper letters, 67 selfloop transitions, 11 changer transitions 0/110 dead transitions. [2023-11-21 22:20:30,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 110 transitions, 596 flow [2023-11-21 22:20:30,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:20:30,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-21 22:20:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 500 transitions. [2023-11-21 22:20:30,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4995004995004995 [2023-11-21 22:20:30,879 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 500 transitions. [2023-11-21 22:20:30,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 500 transitions. [2023-11-21 22:20:30,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:30,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 500 transitions. [2023-11-21 22:20:30,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 45.45454545454545) internal successors, (500), 11 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:30,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 91.0) internal successors, (1092), 12 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:30,885 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 91.0) internal successors, (1092), 12 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:30,885 INFO L175 Difference]: Start difference. First operand has 109 places, 96 transitions, 393 flow. Second operand 11 states and 500 transitions. [2023-11-21 22:20:30,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 110 transitions, 596 flow [2023-11-21 22:20:30,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 110 transitions, 578 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-21 22:20:30,890 INFO L231 Difference]: Finished difference. Result has 118 places, 100 transitions, 436 flow [2023-11-21 22:20:30,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=436, PETRI_PLACES=118, PETRI_TRANSITIONS=100} [2023-11-21 22:20:30,891 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 28 predicate places. [2023-11-21 22:20:30,891 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 100 transitions, 436 flow [2023-11-21 22:20:30,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 40.0) internal successors, (400), 10 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:30,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:30,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:30,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:31,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:31,098 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-21 22:20:31,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:31,098 INFO L85 PathProgramCache]: Analyzing trace with hash -717858786, now seen corresponding path program 1 times [2023-11-21 22:20:31,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:31,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269751029] [2023-11-21 22:20:31,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:31,099 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:31,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:31,100 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:20:31,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-21 22:20:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:31,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 22:20:31,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:31,276 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 [2023-11-21 22:20:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:31,307 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:20:31,308 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:31,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269751029] [2023-11-21 22:20:31,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269751029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:31,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:31,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:20:31,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745459929] [2023-11-21 22:20:31,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:31,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:20:31,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:31,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:20:31,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:20:31,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 91 [2023-11-21 22:20:31,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 100 transitions, 436 flow. Second operand has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:31,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:31,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 91 [2023-11-21 22:20:31,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:32,125 INFO L124 PetriNetUnfolderBase]: 784/1753 cut-off events. [2023-11-21 22:20:32,125 INFO L125 PetriNetUnfolderBase]: For 359/381 co-relation queries the response was YES. [2023-11-21 22:20:32,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3544 conditions, 1753 events. 784/1753 cut-off events. For 359/381 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11853 event pairs, 558 based on Foata normal form. 0/1570 useless extension candidates. Maximal degree in co-relation 3414. Up to 1246 conditions per place. [2023-11-21 22:20:32,139 INFO L140 encePairwiseOnDemand]: 86/91 looper letters, 43 selfloop transitions, 12 changer transitions 0/98 dead transitions. [2023-11-21 22:20:32,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 98 transitions, 542 flow [2023-11-21 22:20:32,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:20:32,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:20:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 243 transitions. [2023-11-21 22:20:32,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6675824175824175 [2023-11-21 22:20:32,142 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 243 transitions. [2023-11-21 22:20:32,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 243 transitions. [2023-11-21 22:20:32,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:32,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 243 transitions. [2023-11-21 22:20:32,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:32,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:32,145 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:32,145 INFO L175 Difference]: Start difference. First operand has 118 places, 100 transitions, 436 flow. Second operand 4 states and 243 transitions. [2023-11-21 22:20:32,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 98 transitions, 542 flow [2023-11-21 22:20:32,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 98 transitions, 538 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:20:32,151 INFO L231 Difference]: Finished difference. Result has 117 places, 98 transitions, 452 flow [2023-11-21 22:20:32,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=452, PETRI_PLACES=117, PETRI_TRANSITIONS=98} [2023-11-21 22:20:32,152 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 27 predicate places. [2023-11-21 22:20:32,152 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 98 transitions, 452 flow [2023-11-21 22:20:32,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:32,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:32,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:32,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-11-21 22:20:32,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:32,357 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-21 22:20:32,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:32,357 INFO L85 PathProgramCache]: Analyzing trace with hash -717858785, now seen corresponding path program 1 times [2023-11-21 22:20:32,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:32,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192158406] [2023-11-21 22:20:32,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:32,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:32,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:32,360 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:20:32,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-21 22:20:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:32,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:20:32,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:32,573 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 [2023-11-21 22:20:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:32,639 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:20:32,639 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:32,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192158406] [2023-11-21 22:20:32,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192158406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:32,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:32,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:20:32,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213210885] [2023-11-21 22:20:32,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:32,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:20:32,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:32,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:20:32,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:20:33,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 91 [2023-11-21 22:20:33,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 98 transitions, 452 flow. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:33,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:33,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 91 [2023-11-21 22:20:33,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:33,716 INFO L124 PetriNetUnfolderBase]: 784/1745 cut-off events. [2023-11-21 22:20:33,716 INFO L125 PetriNetUnfolderBase]: For 410/432 co-relation queries the response was YES. [2023-11-21 22:20:33,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3538 conditions, 1745 events. 784/1745 cut-off events. For 410/432 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11764 event pairs, 558 based on Foata normal form. 8/1570 useless extension candidates. Maximal degree in co-relation 3411. Up to 1246 conditions per place. [2023-11-21 22:20:33,736 INFO L140 encePairwiseOnDemand]: 86/91 looper letters, 41 selfloop transitions, 12 changer transitions 0/96 dead transitions. [2023-11-21 22:20:33,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 96 transitions, 554 flow [2023-11-21 22:20:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:20:33,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:20:33,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 249 transitions. [2023-11-21 22:20:33,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6840659340659341 [2023-11-21 22:20:33,740 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 249 transitions. [2023-11-21 22:20:33,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 249 transitions. [2023-11-21 22:20:33,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:33,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 249 transitions. [2023-11-21 22:20:33,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:33,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:33,744 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:33,744 INFO L175 Difference]: Start difference. First operand has 117 places, 98 transitions, 452 flow. Second operand 4 states and 249 transitions. [2023-11-21 22:20:33,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 96 transitions, 554 flow [2023-11-21 22:20:33,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 96 transitions, 530 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 22:20:33,750 INFO L231 Difference]: Finished difference. Result has 115 places, 96 transitions, 448 flow [2023-11-21 22:20:33,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=448, PETRI_PLACES=115, PETRI_TRANSITIONS=96} [2023-11-21 22:20:33,752 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 25 predicate places. [2023-11-21 22:20:33,752 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 96 transitions, 448 flow [2023-11-21 22:20:33,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:33,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:33,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:33,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:33,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:33,958 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-21 22:20:33,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:33,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1861992230, now seen corresponding path program 1 times [2023-11-21 22:20:33,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:33,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885864134] [2023-11-21 22:20:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:33,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:33,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:33,960 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:20:33,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-21 22:20:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:34,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:20:34,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:34,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:20:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:34,279 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:34,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885864134] [2023-11-21 22:20:34,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885864134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:20:34,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:20:34,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-21 22:20:34,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115191357] [2023-11-21 22:20:34,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:20:34,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:20:34,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:34,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:20:34,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:20:34,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 91 [2023-11-21 22:20:34,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 96 transitions, 448 flow. Second operand has 6 states, 6 states have (on average 58.833333333333336) internal successors, (353), 6 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:34,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:34,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 91 [2023-11-21 22:20:34,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:35,028 INFO L124 PetriNetUnfolderBase]: 784/1795 cut-off events. [2023-11-21 22:20:35,028 INFO L125 PetriNetUnfolderBase]: For 510/532 co-relation queries the response was YES. [2023-11-21 22:20:35,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3692 conditions, 1795 events. 784/1795 cut-off events. For 510/532 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11837 event pairs, 558 based on Foata normal form. 6/1614 useless extension candidates. Maximal degree in co-relation 3486. Up to 1242 conditions per place. [2023-11-21 22:20:35,046 INFO L140 encePairwiseOnDemand]: 87/91 looper letters, 59 selfloop transitions, 12 changer transitions 0/114 dead transitions. [2023-11-21 22:20:35,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 114 transitions, 748 flow [2023-11-21 22:20:35,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:20:35,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 22:20:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 390 transitions. [2023-11-21 22:20:35,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2023-11-21 22:20:35,055 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 390 transitions. [2023-11-21 22:20:35,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 390 transitions. [2023-11-21 22:20:35,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:35,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 390 transitions. [2023-11-21 22:20:35,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:35,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:35,062 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:35,062 INFO L175 Difference]: Start difference. First operand has 115 places, 96 transitions, 448 flow. Second operand 6 states and 390 transitions. [2023-11-21 22:20:35,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 114 transitions, 748 flow [2023-11-21 22:20:35,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 114 transitions, 696 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 22:20:35,069 INFO L231 Difference]: Finished difference. Result has 121 places, 102 transitions, 534 flow [2023-11-21 22:20:35,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=534, PETRI_PLACES=121, PETRI_TRANSITIONS=102} [2023-11-21 22:20:35,071 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 31 predicate places. [2023-11-21 22:20:35,071 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 102 transitions, 534 flow [2023-11-21 22:20:35,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.833333333333336) internal successors, (353), 6 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:35,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:35,072 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:35,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:35,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:35,277 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-21 22:20:35,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:35,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1064317019, now seen corresponding path program 1 times [2023-11-21 22:20:35,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:35,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158347553] [2023-11-21 22:20:35,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:35,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:35,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:35,279 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:20:35,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-21 22:20:35,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:35,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-21 22:20:35,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:35,802 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 [2023-11-21 22:20:36,090 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 [2023-11-21 22:20:36,110 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 [2023-11-21 22:20:36,199 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-21 22:20:36,200 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 [2023-11-21 22:20:36,256 INFO L349 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2023-11-21 22:20:36,256 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 1 case distinctions, treesize of input 20 treesize of output 22 [2023-11-21 22:20:36,349 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 [2023-11-21 22:20:36,373 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 22 treesize of output 17 [2023-11-21 22:20:36,463 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 [2023-11-21 22:20:36,481 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 22 treesize of output 17 [2023-11-21 22:20:36,537 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 [2023-11-21 22:20:36,548 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 18 treesize of output 13 [2023-11-21 22:20:36,630 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 [2023-11-21 22:20:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:36,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:20:36,900 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_686 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_686) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_685 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_686 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_686) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_685) |c_~#c~0.base|) .cse1)))))) is different from false [2023-11-21 22:20:36,997 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_685 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_686 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_686) |c_~#c~0.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_685) |c_~#c~0.base|) .cse0)))) (forall ((v_ArrVal_686 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_686) |c_~#c~0.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2023-11-21 22:20:37,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:20:37,272 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 108 treesize of output 109 [2023-11-21 22:20:37,290 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:20:37,290 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 100 treesize of output 85 [2023-11-21 22:20:37,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:20:37,332 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 121 [2023-11-21 22:20:37,405 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:20:37,405 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 184 treesize of output 163 [2023-11-21 22:20:37,422 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 91 treesize of output 85 [2023-11-21 22:20:37,435 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 85 treesize of output 79 [2023-11-21 22:20:37,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:20:37,513 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 88 treesize of output 112 [2023-11-21 22:20:37,548 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 75 treesize of output 63 [2023-11-21 22:20:39,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-11-21 22:20:39,319 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:20:39,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158347553] [2023-11-21 22:20:39,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158347553] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:20:39,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:20:39,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-11-21 22:20:39,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484580475] [2023-11-21 22:20:39,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:20:39,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 22:20:39,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:20:39,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 22:20:39,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=175, Unknown=2, NotChecked=54, Total=272 [2023-11-21 22:20:39,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 91 [2023-11-21 22:20:39,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 102 transitions, 534 flow. Second operand has 17 states, 17 states have (on average 8.235294117647058) internal successors, (140), 17 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:39,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:39,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 91 [2023-11-21 22:20:39,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:45,762 INFO L124 PetriNetUnfolderBase]: 4046/6517 cut-off events. [2023-11-21 22:20:45,762 INFO L125 PetriNetUnfolderBase]: For 1230/1252 co-relation queries the response was YES. [2023-11-21 22:20:45,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14574 conditions, 6517 events. 4046/6517 cut-off events. For 1230/1252 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 39858 event pairs, 3438 based on Foata normal form. 6/4026 useless extension candidates. Maximal degree in co-relation 14336. Up to 6364 conditions per place. [2023-11-21 22:20:45,819 INFO L140 encePairwiseOnDemand]: 81/91 looper letters, 77 selfloop transitions, 26 changer transitions 0/107 dead transitions. [2023-11-21 22:20:45,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 107 transitions, 754 flow [2023-11-21 22:20:45,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:20:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-21 22:20:45,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 155 transitions. [2023-11-21 22:20:45,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14194139194139194 [2023-11-21 22:20:45,823 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 155 transitions. [2023-11-21 22:20:45,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 155 transitions. [2023-11-21 22:20:45,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:45,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 155 transitions. [2023-11-21 22:20:45,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 12.916666666666666) internal successors, (155), 12 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:45,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 91.0) internal successors, (1183), 13 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:45,828 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 91.0) internal successors, (1183), 13 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:45,828 INFO L175 Difference]: Start difference. First operand has 121 places, 102 transitions, 534 flow. Second operand 12 states and 155 transitions. [2023-11-21 22:20:45,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 107 transitions, 754 flow [2023-11-21 22:20:45,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 107 transitions, 736 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-11-21 22:20:45,887 INFO L231 Difference]: Finished difference. Result has 132 places, 103 transitions, 576 flow [2023-11-21 22:20:45,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=576, PETRI_PLACES=132, PETRI_TRANSITIONS=103} [2023-11-21 22:20:45,888 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 42 predicate places. [2023-11-21 22:20:45,888 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 103 transitions, 576 flow [2023-11-21 22:20:45,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.235294117647058) internal successors, (140), 17 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:45,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:45,888 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:45,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:46,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:46,090 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-21 22:20:46,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:46,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1064317018, now seen corresponding path program 1 times [2023-11-21 22:20:46,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:20:46,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375768922] [2023-11-21 22:20:46,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:46,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:20:46,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:20:46,095 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:20:46,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dae511f-a868-490a-b573-114a00b6be17/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-21 22:20:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat