./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 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/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_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya --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 0.2.4-dev-0e0057c [2023-11-29 05:05:38,864 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:05:38,933 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 05:05:38,939 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:05:38,940 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:05:38,964 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:05:38,965 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:05:38,966 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:05:38,966 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:05:38,967 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:05:38,968 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:05:38,968 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:05:38,969 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:05:38,969 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:05:38,970 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:05:38,970 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:05:38,971 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:05:38,971 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:05:38,972 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:05:38,972 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:05:38,973 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 05:05:38,980 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 05:05:38,980 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 05:05:38,981 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:05:38,981 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 05:05:38,981 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:05:38,982 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:05:38,982 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:05:38,983 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:05:38,983 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:05:38,983 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:05:38,984 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:05:38,984 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:05:38,984 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:05:38,985 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:05:38,985 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:05:38,985 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:05:38,999 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:05:38,999 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:05:38,999 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:05:39,000 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:05:39,000 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_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0270befea30c9963adb19613f3074c8c29d9100e1f0592dc0c89cf3d3dda0df [2023-11-29 05:05:39,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:05:39,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:05:39,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:05:39,256 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:05:39,257 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:05:39,258 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i [2023-11-29 05:05:42,035 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:05:42,262 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:05:42,263 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i [2023-11-29 05:05:42,279 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/data/c0c6370df/f387c5f7cf9a498e80e60b9298ea9df6/FLAG200572c82 [2023-11-29 05:05:42,294 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/data/c0c6370df/f387c5f7cf9a498e80e60b9298ea9df6 [2023-11-29 05:05:42,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:05:42,297 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:05:42,298 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:05:42,298 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:05:42,302 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:05:42,303 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:05:42" (1/1) ... [2023-11-29 05:05:42,304 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c9cd007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:05:42, skipping insertion in model container [2023-11-29 05:05:42,304 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:05:42" (1/1) ... [2023-11-29 05:05:42,361 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:05:42,748 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 05:05:42,748 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 05:05:42,749 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 05:05:42,749 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 05:05:42,775 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:05:42,796 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) [2023-11-29 05:05:42,796 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4498790a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:05:42, skipping insertion in model container [2023-11-29 05:05:42,796 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:05:42,797 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-29 05:05:42,798 INFO L158 Benchmark]: Toolchain (without parser) took 500.33ms. Allocated memory is still 134.2MB. Free memory was 95.6MB in the beginning and 80.1MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-29 05:05:42,799 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 134.2MB. Free memory is still 104.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 05:05:42,799 INFO L158 Benchmark]: CACSL2BoogieTranslator took 498.31ms. Allocated memory is still 134.2MB. Free memory was 95.1MB in the beginning and 80.1MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-29 05:05:42,800 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 134.2MB. Free memory is still 104.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 498.31ms. Allocated memory is still 134.2MB. Free memory was 95.1MB in the beginning and 80.1MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. 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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/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_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya --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 0.2.4-dev-0e0057c [2023-11-29 05:05:44,543 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:05:44,608 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 05:05:44,613 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:05:44,624 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:05:44,654 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:05:44,654 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:05:44,655 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:05:44,656 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:05:44,656 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:05:44,657 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:05:44,658 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:05:44,659 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:05:44,659 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:05:44,660 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:05:44,660 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:05:44,661 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:05:44,661 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:05:44,662 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:05:44,662 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:05:44,663 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 05:05:44,663 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 05:05:44,664 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 05:05:44,664 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:05:44,664 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 05:05:44,665 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 05:05:44,665 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 05:05:44,666 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:05:44,666 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:05:44,666 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:05:44,667 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:05:44,667 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:05:44,667 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:05:44,668 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:05:44,668 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:05:44,668 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:05:44,669 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:05:44,669 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 05:05:44,669 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 05:05:44,669 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:05:44,669 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:05:44,670 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:05:44,670 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:05:44,670 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 05:05:44,670 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_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0270befea30c9963adb19613f3074c8c29d9100e1f0592dc0c89cf3d3dda0df [2023-11-29 05:05:44,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:05:44,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:05:44,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:05:44,990 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:05:44,991 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:05:44,992 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i [2023-11-29 05:05:47,830 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:05:48,089 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:05:48,090 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i [2023-11-29 05:05:48,108 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/data/c727b1e66/bfbc6b93377f43668ae555fa5eb5ea3c/FLAG480a64f32 [2023-11-29 05:05:48,122 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/data/c727b1e66/bfbc6b93377f43668ae555fa5eb5ea3c [2023-11-29 05:05:48,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:05:48,126 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:05:48,128 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:05:48,128 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:05:48,132 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:05:48,133 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:05:48" (1/1) ... [2023-11-29 05:05:48,134 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b19c8ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:05:48, skipping insertion in model container [2023-11-29 05:05:48,134 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:05:48" (1/1) ... [2023-11-29 05:05:48,187 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:05:48,620 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 05:05:48,620 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 05:05:48,621 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 05:05:48,621 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 05:05:48,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:05:48,669 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 05:05:48,683 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:05:48,708 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 05:05:48,708 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 05:05:48,709 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 05:05:48,709 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 05:05:48,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:05:48,728 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:05:48,758 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 05:05:48,759 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 05:05:48,759 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 05:05:48,760 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 05:05:48,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:05:48,844 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:05:48,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:05:48 WrapperNode [2023-11-29 05:05:48,845 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:05:48,846 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:05:48,846 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:05:48,847 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:05:48,854 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:05:48" (1/1) ... [2023-11-29 05:05:48,875 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:05:48" (1/1) ... [2023-11-29 05:05:48,902 INFO L138 Inliner]: procedures = 276, calls = 36, calls flagged for inlining = 9, calls inlined = 8, statements flattened = 132 [2023-11-29 05:05:48,903 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:05:48,903 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:05:48,904 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:05:48,904 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:05:48,915 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:05:48" (1/1) ... [2023-11-29 05:05:48,915 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:05:48" (1/1) ... [2023-11-29 05:05:48,919 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:05:48" (1/1) ... [2023-11-29 05:05:48,948 INFO L175 MemorySlicer]: Split 18 memory accesses to 3 slices as follows [16, 1, 1]. 89 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0, 0]. The 14 writes are split as follows [12, 1, 1]. [2023-11-29 05:05:48,948 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:05:48" (1/1) ... [2023-11-29 05:05:48,948 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:05:48" (1/1) ... [2023-11-29 05:05:48,962 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:05:48" (1/1) ... [2023-11-29 05:05:48,966 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:05:48" (1/1) ... [2023-11-29 05:05:48,969 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:05:48" (1/1) ... [2023-11-29 05:05:48,972 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:05:48" (1/1) ... [2023-11-29 05:05:48,977 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:05:48,978 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:05:48,978 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:05:48,978 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:05:48,979 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:05:48" (1/1) ... [2023-11-29 05:05:48,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:05:48,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:05:49,012 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:05:49,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:05:49,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 05:05:49,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 05:05:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 05:05:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-29 05:05:49,050 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-29 05:05:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:05:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 05:05:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 05:05:49,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 05:05:49,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:05:49,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 05:05:49,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 05:05:49,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 05:05:49,051 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 05:05:49,052 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 05:05:49,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:05:49,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:05:49,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 05:05:49,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 05:05:49,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 05:05:49,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:05:49,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:05:49,054 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 05:05:49,220 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:05:49,222 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:05:49,744 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:05:49,911 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:05:49,911 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 05:05:49,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:05:49 BoogieIcfgContainer [2023-11-29 05:05:49,912 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:05:49,914 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:05:49,914 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:05:49,917 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:05:49,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:05:48" (1/3) ... [2023-11-29 05:05:49,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4127c472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:05:49, skipping insertion in model container [2023-11-29 05:05:49,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:05:48" (2/3) ... [2023-11-29 05:05:49,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4127c472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:05:49, skipping insertion in model container [2023-11-29 05:05:49,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:05:49" (3/3) ... [2023-11-29 05:05:49,919 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_22-nocollapse.i [2023-11-29 05:05:49,933 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:05:49,933 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2023-11-29 05:05:49,933 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:05:50,022 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 05:05:50,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 91 transitions, 190 flow [2023-11-29 05:05:50,106 INFO L124 PetriNetUnfolderBase]: 6/89 cut-off events. [2023-11-29 05:05:50,106 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 05:05:50,111 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. [2023-11-29 05:05:50,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 91 transitions, 190 flow [2023-11-29 05:05:50,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 89 transitions, 184 flow [2023-11-29 05:05:50,128 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:05:50,135 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;@7dfc946e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:05:50,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2023-11-29 05:05:50,139 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:05:50,139 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 05:05:50,139 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 05:05:50,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:05:50,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 05:05:50,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:05:50,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:05:50,146 INFO L85 PathProgramCache]: Analyzing trace with hash 415195, now seen corresponding path program 1 times [2023-11-29 05:05:50,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:05:50,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927941238] [2023-11-29 05:05:50,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:50,174 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 [2023-11-29 05:05:50,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:05:50,194 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:05:50,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:05:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:50,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:05:50,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:05:50,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:05:50,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:05:50,401 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 [2023-11-29 05:05:50,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:05:50,424 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 [2023-11-29 05:05:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:05:50,458 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:05:50,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:05:50,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927941238] [2023-11-29 05:05:50,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927941238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:05:50,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:05:50,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:05:50,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201453781] [2023-11-29 05:05:50,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:05:50,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:05:50,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:05:50,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:05:50,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:05:50,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 91 [2023-11-29 05:05:50,749 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) [2023-11-29 05:05:50,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:05:50,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 91 [2023-11-29 05:05:50,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:05:51,305 INFO L124 PetriNetUnfolderBase]: 543/1066 cut-off events. [2023-11-29 05:05:51,305 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-29 05:05:51,309 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. [2023-11-29 05:05:51,320 INFO L140 encePairwiseOnDemand]: 83/91 looper letters, 55 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2023-11-29 05:05:51,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 107 transitions, 338 flow [2023-11-29 05:05:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:05:51,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:05:51,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 263 transitions. [2023-11-29 05:05:51,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7225274725274725 [2023-11-29 05:05:51,336 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 263 transitions. [2023-11-29 05:05:51,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 263 transitions. [2023-11-29 05:05:51,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:05:51,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 263 transitions. [2023-11-29 05:05:51,343 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) [2023-11-29 05:05:51,348 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) [2023-11-29 05:05:51,348 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) [2023-11-29 05:05:51,350 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 184 flow. Second operand 4 states and 263 transitions. [2023-11-29 05:05:51,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 107 transitions, 338 flow [2023-11-29 05:05:51,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 107 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:05:51,358 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 194 flow [2023-11-29 05:05:51,360 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} [2023-11-29 05:05:51,364 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 0 predicate places. [2023-11-29 05:05:51,364 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 194 flow [2023-11-29 05:05:51,365 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) [2023-11-29 05:05:51,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:05:51,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 05:05:51,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:05:51,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:05:51,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:05:51,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:05:51,567 INFO L85 PathProgramCache]: Analyzing trace with hash 415196, now seen corresponding path program 1 times [2023-11-29 05:05:51,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:05:51,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785295732] [2023-11-29 05:05:51,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:51,568 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 [2023-11-29 05:05:51,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:05:51,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:05:51,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:05:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:51,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:05:51,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:05:51,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:05:51,688 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 [2023-11-29 05:05:51,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:05:51,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:05:51,721 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 [2023-11-29 05:05:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:05:51,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:05:51,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:05:51,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785295732] [2023-11-29 05:05:51,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785295732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:05:51,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:05:51,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:05:51,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715417148] [2023-11-29 05:05:51,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:05:51,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:05:51,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:05:51,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:05:51,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:05:52,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 91 [2023-11-29 05:05:52,127 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) [2023-11-29 05:05:52,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:05:52,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 91 [2023-11-29 05:05:52,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:05:52,574 INFO L124 PetriNetUnfolderBase]: 484/994 cut-off events. [2023-11-29 05:05:52,574 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2023-11-29 05:05:52,577 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. [2023-11-29 05:05:52,584 INFO L140 encePairwiseOnDemand]: 83/91 looper letters, 38 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2023-11-29 05:05:52,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 91 transitions, 294 flow [2023-11-29 05:05:52,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:05:52,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:05:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 254 transitions. [2023-11-29 05:05:52,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6978021978021978 [2023-11-29 05:05:52,588 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 254 transitions. [2023-11-29 05:05:52,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 254 transitions. [2023-11-29 05:05:52,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:05:52,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 254 transitions. [2023-11-29 05:05:52,590 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) [2023-11-29 05:05:52,592 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) [2023-11-29 05:05:52,592 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) [2023-11-29 05:05:52,592 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 194 flow. Second operand 4 states and 254 transitions. [2023-11-29 05:05:52,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 91 transitions, 294 flow [2023-11-29 05:05:52,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 282 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:05:52,596 INFO L231 Difference]: Finished difference. Result has 92 places, 91 transitions, 227 flow [2023-11-29 05:05:52,596 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} [2023-11-29 05:05:52,597 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2023-11-29 05:05:52,597 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 91 transitions, 227 flow [2023-11-29 05:05:52,598 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) [2023-11-29 05:05:52,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:05:52,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 05:05:52,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-29 05:05:52,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:05:52,799 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:05:52,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:05:52,799 INFO L85 PathProgramCache]: Analyzing trace with hash -515465405, now seen corresponding path program 1 times [2023-11-29 05:05:52,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:05:52,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103135505] [2023-11-29 05:05:52,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:52,800 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 [2023-11-29 05:05:52,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:05:52,801 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:05:52,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:05:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:52,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:05:52,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:05:52,921 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 [2023-11-29 05:05:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:05:52,931 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:05:52,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:05:52,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103135505] [2023-11-29 05:05:52,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103135505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:05:52,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:05:52,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:05:52,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647989264] [2023-11-29 05:05:52,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:05:52,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:05:52,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:05:52,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:05:52,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:05:53,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 91 [2023-11-29 05:05:53,138 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) [2023-11-29 05:05:53,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:05:53,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 91 [2023-11-29 05:05:53,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:05:53,473 INFO L124 PetriNetUnfolderBase]: 484/993 cut-off events. [2023-11-29 05:05:53,473 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-29 05:05:53,475 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. [2023-11-29 05:05:53,481 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 36 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2023-11-29 05:05:53,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 90 transitions, 303 flow [2023-11-29 05:05:53,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:05:53,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:05:53,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2023-11-29 05:05:53,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7362637362637363 [2023-11-29 05:05:53,484 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2023-11-29 05:05:53,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2023-11-29 05:05:53,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:05:53,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2023-11-29 05:05:53,486 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) [2023-11-29 05:05:53,487 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) [2023-11-29 05:05:53,487 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) [2023-11-29 05:05:53,488 INFO L175 Difference]: Start difference. First operand has 92 places, 91 transitions, 227 flow. Second operand 3 states and 201 transitions. [2023-11-29 05:05:53,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 90 transitions, 303 flow [2023-11-29 05:05:53,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 90 transitions, 300 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:05:53,491 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 228 flow [2023-11-29 05:05:53,492 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} [2023-11-29 05:05:53,492 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2023-11-29 05:05:53,493 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 228 flow [2023-11-29 05:05:53,493 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) [2023-11-29 05:05:53,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:05:53,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 05:05:53,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-29 05:05:53,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:05:53,696 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:05:53,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:05:53,697 INFO L85 PathProgramCache]: Analyzing trace with hash -515465406, now seen corresponding path program 1 times [2023-11-29 05:05:53,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:05:53,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704105571] [2023-11-29 05:05:53,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:53,698 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 [2023-11-29 05:05:53,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:05:53,699 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:05:53,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:05:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:53,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:05:53,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:05:53,795 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 [2023-11-29 05:05:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:05:53,803 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:05:53,803 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:05:53,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704105571] [2023-11-29 05:05:53,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704105571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:05:53,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:05:53,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:05:53,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294975037] [2023-11-29 05:05:53,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:05:53,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:05:53,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:05:53,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:05:53,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:05:53,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 91 [2023-11-29 05:05:53,955 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) [2023-11-29 05:05:53,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:05:53,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 91 [2023-11-29 05:05:53,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:05:54,272 INFO L124 PetriNetUnfolderBase]: 484/992 cut-off events. [2023-11-29 05:05:54,273 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-29 05:05:54,275 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. [2023-11-29 05:05:54,282 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 36 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2023-11-29 05:05:54,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 89 transitions, 304 flow [2023-11-29 05:05:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:05:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:05:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2023-11-29 05:05:54,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7362637362637363 [2023-11-29 05:05:54,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2023-11-29 05:05:54,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2023-11-29 05:05:54,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:05:54,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2023-11-29 05:05:54,285 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) [2023-11-29 05:05:54,286 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) [2023-11-29 05:05:54,287 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) [2023-11-29 05:05:54,287 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 228 flow. Second operand 3 states and 201 transitions. [2023-11-29 05:05:54,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 89 transitions, 304 flow [2023-11-29 05:05:54,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 89 transitions, 298 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:05:54,290 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 226 flow [2023-11-29 05:05:54,291 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} [2023-11-29 05:05:54,291 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 1 predicate places. [2023-11-29 05:05:54,292 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 226 flow [2023-11-29 05:05:54,292 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) [2023-11-29 05:05:54,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:05:54,292 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-29 05:05:54,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:05:54,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:05:54,495 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:05:54,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:05:54,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1200443502, now seen corresponding path program 1 times [2023-11-29 05:05:54,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:05:54,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669947367] [2023-11-29 05:05:54,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:54,497 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 [2023-11-29 05:05:54,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:05:54,498 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:05:54,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:05:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:54,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:05:54,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:05:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:05:54,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:05:54,582 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:05:54,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669947367] [2023-11-29 05:05:54,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669947367] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:05:54,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:05:54,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:05:54,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713423259] [2023-11-29 05:05:54,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:05:54,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:05:54,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:05:54,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:05:54,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:05:54,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 91 [2023-11-29 05:05:54,585 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) [2023-11-29 05:05:54,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:05:54,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 91 [2023-11-29 05:05:54,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:05:54,888 INFO L124 PetriNetUnfolderBase]: 483/1014 cut-off events. [2023-11-29 05:05:54,888 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-29 05:05:54,890 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. [2023-11-29 05:05:54,895 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 40 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2023-11-29 05:05:54,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 324 flow [2023-11-29 05:05:54,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:05:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:05:54,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 209 transitions. [2023-11-29 05:05:54,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7655677655677655 [2023-11-29 05:05:54,897 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 209 transitions. [2023-11-29 05:05:54,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 209 transitions. [2023-11-29 05:05:54,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:05:54,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 209 transitions. [2023-11-29 05:05:54,899 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) [2023-11-29 05:05:54,899 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) [2023-11-29 05:05:54,900 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) [2023-11-29 05:05:54,900 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 226 flow. Second operand 3 states and 209 transitions. [2023-11-29 05:05:54,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 324 flow [2023-11-29 05:05:54,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 93 transitions, 314 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:05:54,903 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 231 flow [2023-11-29 05:05:54,904 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} [2023-11-29 05:05:54,904 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2023-11-29 05:05:54,905 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 231 flow [2023-11-29 05:05:54,905 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) [2023-11-29 05:05:54,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:05:54,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:05:54,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:05:55,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:05:55,108 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:05:55,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:05:55,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1200442016, now seen corresponding path program 1 times [2023-11-29 05:05:55,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:05:55,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89034314] [2023-11-29 05:05:55,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:55,109 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 [2023-11-29 05:05:55,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:05:55,111 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:05:55,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:05:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:55,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:05:55,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:05:55,234 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 [2023-11-29 05:05:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:05:55,265 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:05:55,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:05:55,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89034314] [2023-11-29 05:05:55,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89034314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:05:55,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:05:55,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:05:55,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489911238] [2023-11-29 05:05:55,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:05:55,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:05:55,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:05:55,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:05:55,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:05:55,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 91 [2023-11-29 05:05:55,649 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) [2023-11-29 05:05:55,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:05:55,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 91 [2023-11-29 05:05:55,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:05:56,019 INFO L124 PetriNetUnfolderBase]: 483/1010 cut-off events. [2023-11-29 05:05:56,019 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-11-29 05:05:56,021 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. [2023-11-29 05:05:56,028 INFO L140 encePairwiseOnDemand]: 86/91 looper letters, 37 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-11-29 05:05:56,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 87 transitions, 309 flow [2023-11-29 05:05:56,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:05:56,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:05:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 243 transitions. [2023-11-29 05:05:56,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6675824175824175 [2023-11-29 05:05:56,031 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 243 transitions. [2023-11-29 05:05:56,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 243 transitions. [2023-11-29 05:05:56,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:05:56,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 243 transitions. [2023-11-29 05:05:56,047 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) [2023-11-29 05:05:56,049 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) [2023-11-29 05:05:56,049 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) [2023-11-29 05:05:56,049 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 231 flow. Second operand 4 states and 243 transitions. [2023-11-29 05:05:56,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 87 transitions, 309 flow [2023-11-29 05:05:56,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 87 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:05:56,052 INFO L231 Difference]: Finished difference. Result has 92 places, 87 transitions, 232 flow [2023-11-29 05:05:56,053 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} [2023-11-29 05:05:56,053 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2023-11-29 05:05:56,054 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 232 flow [2023-11-29 05:05:56,054 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) [2023-11-29 05:05:56,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:05:56,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:05:56,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:05:56,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:05:56,258 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:05:56,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:05:56,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1200442015, now seen corresponding path program 1 times [2023-11-29 05:05:56,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:05:56,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777209088] [2023-11-29 05:05:56,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:56,259 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 [2023-11-29 05:05:56,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:05:56,260 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:05:56,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:05:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:56,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:05:56,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:05:56,359 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 [2023-11-29 05:05:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:05:56,374 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:05:56,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:05:56,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777209088] [2023-11-29 05:05:56,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777209088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:05:56,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:05:56,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:05:56,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662306491] [2023-11-29 05:05:56,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:05:56,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:05:56,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:05:56,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:05:56,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:05:56,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 91 [2023-11-29 05:05:56,584 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) [2023-11-29 05:05:56,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:05:56,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 91 [2023-11-29 05:05:56,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:05:56,923 INFO L124 PetriNetUnfolderBase]: 483/1006 cut-off events. [2023-11-29 05:05:56,923 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-29 05:05:56,924 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. [2023-11-29 05:05:56,930 INFO L140 encePairwiseOnDemand]: 84/91 looper letters, 34 selfloop transitions, 7 changer transitions 0/85 dead transitions. [2023-11-29 05:05:56,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 85 transitions, 310 flow [2023-11-29 05:05:56,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:05:56,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:05:56,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 284 transitions. [2023-11-29 05:05:56,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6241758241758242 [2023-11-29 05:05:56,932 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 284 transitions. [2023-11-29 05:05:56,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 284 transitions. [2023-11-29 05:05:56,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:05:56,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 284 transitions. [2023-11-29 05:05:56,933 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) [2023-11-29 05:05:56,934 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) [2023-11-29 05:05:56,934 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) [2023-11-29 05:05:56,935 INFO L175 Difference]: Start difference. First operand has 92 places, 87 transitions, 232 flow. Second operand 5 states and 284 transitions. [2023-11-29 05:05:56,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 85 transitions, 310 flow [2023-11-29 05:05:56,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 85 transitions, 302 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:05:56,937 INFO L231 Difference]: Finished difference. Result has 91 places, 85 transitions, 234 flow [2023-11-29 05:05:56,937 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} [2023-11-29 05:05:56,937 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 1 predicate places. [2023-11-29 05:05:56,937 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 85 transitions, 234 flow [2023-11-29 05:05:56,938 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) [2023-11-29 05:05:56,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:05:56,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:05:56,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-29 05:05:57,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:05:57,139 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:05:57,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:05:57,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1721415487, now seen corresponding path program 1 times [2023-11-29 05:05:57,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:05:57,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428606724] [2023-11-29 05:05:57,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:57,140 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 [2023-11-29 05:05:57,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:05:57,141 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:05:57,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:05:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:57,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:05:57,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:05:57,306 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 [2023-11-29 05:05:57,369 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:05:57,369 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 [2023-11-29 05:05:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:05:57,455 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:05:57,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:05:57,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428606724] [2023-11-29 05:05:57,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428606724] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:05:57,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:05:57,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:05:57,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509434560] [2023-11-29 05:05:57,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:05:57,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:05:57,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:05:57,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:05:57,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:05:58,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 91 [2023-11-29 05:05:58,076 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) [2023-11-29 05:05:58,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:05:58,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 91 [2023-11-29 05:05:58,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:05:58,597 INFO L124 PetriNetUnfolderBase]: 839/1876 cut-off events. [2023-11-29 05:05:58,598 INFO L125 PetriNetUnfolderBase]: For 83/85 co-relation queries the response was YES. [2023-11-29 05:05:58,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3406 conditions, 1876 events. 839/1876 cut-off events. For 83/85 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12928 event pairs, 246 based on Foata normal form. 43/1737 useless extension candidates. Maximal degree in co-relation 3369. Up to 754 conditions per place. [2023-11-29 05:05:58,608 INFO L140 encePairwiseOnDemand]: 78/91 looper letters, 51 selfloop transitions, 13 changer transitions 0/104 dead transitions. [2023-11-29 05:05:58,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 104 transitions, 400 flow [2023-11-29 05:05:58,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:05:58,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:05:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 407 transitions. [2023-11-29 05:05:58,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6389324960753532 [2023-11-29 05:05:58,612 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 407 transitions. [2023-11-29 05:05:58,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 407 transitions. [2023-11-29 05:05:58,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:05:58,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 407 transitions. [2023-11-29 05:05:58,614 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) [2023-11-29 05:05:58,615 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) [2023-11-29 05:05:58,616 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) [2023-11-29 05:05:58,616 INFO L175 Difference]: Start difference. First operand has 91 places, 85 transitions, 234 flow. Second operand 7 states and 407 transitions. [2023-11-29 05:05:58,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 104 transitions, 400 flow [2023-11-29 05:05:58,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 104 transitions, 386 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:05:58,619 INFO L231 Difference]: Finished difference. Result has 93 places, 85 transitions, 269 flow [2023-11-29 05:05:58,619 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} [2023-11-29 05:05:58,620 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 3 predicate places. [2023-11-29 05:05:58,620 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 85 transitions, 269 flow [2023-11-29 05:05:58,621 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) [2023-11-29 05:05:58,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:05:58,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:05:58,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 05:05:58,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:05:58,821 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:05:58,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:05:58,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1721415486, now seen corresponding path program 1 times [2023-11-29 05:05:58,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:05:58,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552247411] [2023-11-29 05:05:58,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:58,823 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 [2023-11-29 05:05:58,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:05:58,824 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:05:58,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:05:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:58,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 05:05:58,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:05:59,120 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 05:05:59,120 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 [2023-11-29 05:05:59,142 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 05:05:59,143 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 [2023-11-29 05:05:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:05:59,244 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:05:59,245 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:05:59,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552247411] [2023-11-29 05:05:59,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552247411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:05:59,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:05:59,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:05:59,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404014776] [2023-11-29 05:05:59,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:05:59,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:05:59,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:05:59,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:05:59,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:06:00,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 91 [2023-11-29 05:06:00,409 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) [2023-11-29 05:06:00,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:06:00,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 91 [2023-11-29 05:06:00,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:06:01,043 INFO L124 PetriNetUnfolderBase]: 840/1864 cut-off events. [2023-11-29 05:06:01,043 INFO L125 PetriNetUnfolderBase]: For 527/552 co-relation queries the response was YES. [2023-11-29 05:06:01,045 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 12680 event pairs, 605 based on Foata normal form. 2/1656 useless extension candidates. Maximal degree in co-relation 3668. Up to 1351 conditions per place. [2023-11-29 05:06:01,054 INFO L140 encePairwiseOnDemand]: 82/91 looper letters, 47 selfloop transitions, 9 changer transitions 0/94 dead transitions. [2023-11-29 05:06:01,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 94 transitions, 420 flow [2023-11-29 05:06:01,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:06:01,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:06:01,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 323 transitions. [2023-11-29 05:06:01,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5915750915750916 [2023-11-29 05:06:01,057 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 323 transitions. [2023-11-29 05:06:01,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 323 transitions. [2023-11-29 05:06:01,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:06:01,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 323 transitions. [2023-11-29 05:06:01,058 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) [2023-11-29 05:06:01,059 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) [2023-11-29 05:06:01,059 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) [2023-11-29 05:06:01,060 INFO L175 Difference]: Start difference. First operand has 93 places, 85 transitions, 269 flow. Second operand 6 states and 323 transitions. [2023-11-29 05:06:01,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 94 transitions, 420 flow [2023-11-29 05:06:01,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 94 transitions, 389 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 05:06:01,063 INFO L231 Difference]: Finished difference. Result has 96 places, 90 transitions, 315 flow [2023-11-29 05:06:01,064 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} [2023-11-29 05:06:01,064 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 6 predicate places. [2023-11-29 05:06:01,065 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 90 transitions, 315 flow [2023-11-29 05:06:01,065 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) [2023-11-29 05:06:01,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:06:01,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:06:01,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-29 05:06:01,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:06:01,266 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:06:01,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:01,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1824272065, now seen corresponding path program 1 times [2023-11-29 05:06:01,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:06:01,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878666484] [2023-11-29 05:06:01,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:01,267 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 [2023-11-29 05:06:01,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:06:01,268 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:06:01,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:06:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:01,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 05:06:01,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:06:01,489 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 [2023-11-29 05:06:01,529 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 [2023-11-29 05:06:01,596 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 05:06:01,596 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 [2023-11-29 05:06:01,670 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 [2023-11-29 05:06:01,735 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 [2023-11-29 05:06:01,764 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 [2023-11-29 05:06:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:06:01,831 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:06:01,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:06:01,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878666484] [2023-11-29 05:06:01,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878666484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:06:01,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:06:01,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:06:01,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732543769] [2023-11-29 05:06:01,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:06:01,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:06:01,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:06:01,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:06:01,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:06:03,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 91 [2023-11-29 05:06:03,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 90 transitions, 315 flow. Second operand has 10 states, 10 states have (on average 44.0) internal successors, (440), 10 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:03,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:06:03,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 91 [2023-11-29 05:06:03,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:06:04,462 INFO L124 PetriNetUnfolderBase]: 840/1862 cut-off events. [2023-11-29 05:06:04,462 INFO L125 PetriNetUnfolderBase]: For 375/400 co-relation queries the response was YES. [2023-11-29 05:06:04,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3754 conditions, 1862 events. 840/1862 cut-off events. For 375/400 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12662 event pairs, 605 based on Foata normal form. 0/1667 useless extension candidates. Maximal degree in co-relation 3650. Up to 1354 conditions per place. [2023-11-29 05:06:04,473 INFO L140 encePairwiseOnDemand]: 80/91 looper letters, 48 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2023-11-29 05:06:04,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 99 transitions, 470 flow [2023-11-29 05:06:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:06:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 05:06:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 526 transitions. [2023-11-29 05:06:04,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254745254745254 [2023-11-29 05:06:04,478 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 526 transitions. [2023-11-29 05:06:04,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 526 transitions. [2023-11-29 05:06:04,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:06:04,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 526 transitions. [2023-11-29 05:06:04,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 47.81818181818182) internal successors, (526), 11 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:04,483 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) [2023-11-29 05:06:04,483 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) [2023-11-29 05:06:04,483 INFO L175 Difference]: Start difference. First operand has 96 places, 90 transitions, 315 flow. Second operand 11 states and 526 transitions. [2023-11-29 05:06:04,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 99 transitions, 470 flow [2023-11-29 05:06:04,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 99 transitions, 466 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:06:04,487 INFO L231 Difference]: Finished difference. Result has 109 places, 96 transitions, 393 flow [2023-11-29 05:06:04,488 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} [2023-11-29 05:06:04,488 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 19 predicate places. [2023-11-29 05:06:04,488 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 96 transitions, 393 flow [2023-11-29 05:06:04,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 44.0) internal successors, (440), 10 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:04,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:06:04,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:06:04,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-11-29 05:06:04,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:06:04,689 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:06:04,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:04,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1824272064, now seen corresponding path program 1 times [2023-11-29 05:06:04,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:06:04,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783278999] [2023-11-29 05:06:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:04,690 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 [2023-11-29 05:06:04,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:06:04,691 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:06:04,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:06:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:04,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 05:06:04,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:06:04,934 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 [2023-11-29 05:06:04,944 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 [2023-11-29 05:06:04,999 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 [2023-11-29 05:06:05,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 05:06:05,109 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 05:06:05,110 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 [2023-11-29 05:06:05,132 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 05:06:05,132 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 [2023-11-29 05:06:05,199 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 [2023-11-29 05:06:05,215 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 [2023-11-29 05:06:05,275 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 [2023-11-29 05:06:05,287 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 [2023-11-29 05:06:05,325 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 [2023-11-29 05:06:05,336 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 [2023-11-29 05:06:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:06:05,405 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:06:05,405 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:06:05,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783278999] [2023-11-29 05:06:05,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783278999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:06:05,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:06:05,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:06:05,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319075810] [2023-11-29 05:06:05,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:06:05,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:06:05,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:06:05,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:06:05,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:06:07,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 91 [2023-11-29 05:06:07,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 96 transitions, 393 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) [2023-11-29 05:06:07,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:06:07,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 91 [2023-11-29 05:06:07,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:06:08,598 INFO L124 PetriNetUnfolderBase]: 840/1861 cut-off events. [2023-11-29 05:06:08,598 INFO L125 PetriNetUnfolderBase]: For 402/427 co-relation queries the response was YES. [2023-11-29 05:06:08,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3801 conditions, 1861 events. 840/1861 cut-off events. For 402/427 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12711 event pairs, 605 based on Foata normal form. 1/1670 useless extension candidates. Maximal degree in co-relation 3657. Up to 1359 conditions per place. [2023-11-29 05:06:08,610 INFO L140 encePairwiseOnDemand]: 79/91 looper letters, 65 selfloop transitions, 11 changer transitions 0/110 dead transitions. [2023-11-29 05:06:08,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 110 transitions, 592 flow [2023-11-29 05:06:08,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:06:08,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 05:06:08,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 520 transitions. [2023-11-29 05:06:08,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194805194805194 [2023-11-29 05:06:08,613 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 520 transitions. [2023-11-29 05:06:08,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 520 transitions. [2023-11-29 05:06:08,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:06:08,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 520 transitions. [2023-11-29 05:06:08,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 47.27272727272727) internal successors, (520), 11 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:08,616 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) [2023-11-29 05:06:08,617 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) [2023-11-29 05:06:08,617 INFO L175 Difference]: Start difference. First operand has 109 places, 96 transitions, 393 flow. Second operand 11 states and 520 transitions. [2023-11-29 05:06:08,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 110 transitions, 592 flow [2023-11-29 05:06:08,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 110 transitions, 574 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 05:06:08,620 INFO L231 Difference]: Finished difference. Result has 118 places, 100 transitions, 436 flow [2023-11-29 05:06:08,620 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} [2023-11-29 05:06:08,621 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 28 predicate places. [2023-11-29 05:06:08,621 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 100 transitions, 436 flow [2023-11-29 05:06:08,621 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) [2023-11-29 05:06:08,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:06:08,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:06:08,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-29 05:06:08,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:06:08,822 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:06:08,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:08,822 INFO L85 PathProgramCache]: Analyzing trace with hash -717858786, now seen corresponding path program 1 times [2023-11-29 05:06:08,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:06:08,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386949848] [2023-11-29 05:06:08,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:08,823 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 [2023-11-29 05:06:08,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:06:08,824 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:06:08,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:06:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:08,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:06:08,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:06:08,957 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 [2023-11-29 05:06:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:06:08,979 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:06:08,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:06:08,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386949848] [2023-11-29 05:06:08,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386949848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:06:08,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:06:08,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:06:08,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153365285] [2023-11-29 05:06:08,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:06:08,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:06:08,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:06:08,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:06:08,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:06:09,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 91 [2023-11-29 05:06:09,191 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) [2023-11-29 05:06:09,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:06:09,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 91 [2023-11-29 05:06:09,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:06:09,722 INFO L124 PetriNetUnfolderBase]: 784/1753 cut-off events. [2023-11-29 05:06:09,722 INFO L125 PetriNetUnfolderBase]: For 359/381 co-relation queries the response was YES. [2023-11-29 05:06:09,735 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 11825 event pairs, 557 based on Foata normal form. 0/1570 useless extension candidates. Maximal degree in co-relation 3414. Up to 1246 conditions per place. [2023-11-29 05:06:09,743 INFO L140 encePairwiseOnDemand]: 86/91 looper letters, 43 selfloop transitions, 12 changer transitions 0/98 dead transitions. [2023-11-29 05:06:09,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 98 transitions, 542 flow [2023-11-29 05:06:09,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:06:09,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:06:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 243 transitions. [2023-11-29 05:06:09,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6675824175824175 [2023-11-29 05:06:09,746 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 243 transitions. [2023-11-29 05:06:09,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 243 transitions. [2023-11-29 05:06:09,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:06:09,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 243 transitions. [2023-11-29 05:06:09,747 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) [2023-11-29 05:06:09,748 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) [2023-11-29 05:06:09,748 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) [2023-11-29 05:06:09,748 INFO L175 Difference]: Start difference. First operand has 118 places, 100 transitions, 436 flow. Second operand 4 states and 243 transitions. [2023-11-29 05:06:09,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 98 transitions, 542 flow [2023-11-29 05:06:09,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 98 transitions, 538 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:06:09,753 INFO L231 Difference]: Finished difference. Result has 117 places, 98 transitions, 452 flow [2023-11-29 05:06:09,753 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} [2023-11-29 05:06:09,754 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 27 predicate places. [2023-11-29 05:06:09,754 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 98 transitions, 452 flow [2023-11-29 05:06:09,755 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) [2023-11-29 05:06:09,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:06:09,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:06:09,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:06:09,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:06:09,958 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:06:09,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:09,959 INFO L85 PathProgramCache]: Analyzing trace with hash -717858785, now seen corresponding path program 1 times [2023-11-29 05:06:09,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:06:09,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513248217] [2023-11-29 05:06:09,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:09,959 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 [2023-11-29 05:06:09,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:06:09,960 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:06:09,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:06:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:10,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:06:10,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:06:10,087 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 [2023-11-29 05:06:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:06:10,126 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:06:10,126 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:06:10,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513248217] [2023-11-29 05:06:10,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513248217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:06:10,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:06:10,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:06:10,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639516051] [2023-11-29 05:06:10,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:06:10,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:06:10,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:06:10,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:06:10,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:06:10,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 91 [2023-11-29 05:06:10,444 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) [2023-11-29 05:06:10,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:06:10,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 91 [2023-11-29 05:06:10,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:06:10,842 INFO L124 PetriNetUnfolderBase]: 784/1745 cut-off events. [2023-11-29 05:06:10,842 INFO L125 PetriNetUnfolderBase]: For 410/432 co-relation queries the response was YES. [2023-11-29 05:06:10,844 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, 557 based on Foata normal form. 8/1570 useless extension candidates. Maximal degree in co-relation 3411. Up to 1246 conditions per place. [2023-11-29 05:06:10,850 INFO L140 encePairwiseOnDemand]: 86/91 looper letters, 41 selfloop transitions, 12 changer transitions 0/96 dead transitions. [2023-11-29 05:06:10,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 96 transitions, 554 flow [2023-11-29 05:06:10,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:06:10,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:06:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 249 transitions. [2023-11-29 05:06:10,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6840659340659341 [2023-11-29 05:06:10,852 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 249 transitions. [2023-11-29 05:06:10,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 249 transitions. [2023-11-29 05:06:10,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:06:10,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 249 transitions. [2023-11-29 05:06:10,853 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) [2023-11-29 05:06:10,853 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) [2023-11-29 05:06:10,854 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) [2023-11-29 05:06:10,854 INFO L175 Difference]: Start difference. First operand has 117 places, 98 transitions, 452 flow. Second operand 4 states and 249 transitions. [2023-11-29 05:06:10,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 96 transitions, 554 flow [2023-11-29 05:06:10,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 96 transitions, 530 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:06:10,857 INFO L231 Difference]: Finished difference. Result has 115 places, 96 transitions, 448 flow [2023-11-29 05:06:10,857 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} [2023-11-29 05:06:10,858 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 25 predicate places. [2023-11-29 05:06:10,858 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 96 transitions, 448 flow [2023-11-29 05:06:10,858 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) [2023-11-29 05:06:10,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:06:10,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:06:10,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-11-29 05:06:11,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:06:11,059 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:06:11,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:11,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1861992230, now seen corresponding path program 1 times [2023-11-29 05:06:11,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:06:11,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490152740] [2023-11-29 05:06:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:11,060 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 [2023-11-29 05:06:11,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:06:11,061 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:06:11,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:06:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:11,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:06:11,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:06:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:06:11,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:06:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:06:11,256 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:06:11,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490152740] [2023-11-29 05:06:11,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490152740] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:06:11,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:06:11,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-29 05:06:11,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248768316] [2023-11-29 05:06:11,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:06:11,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:06:11,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:06:11,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:06:11,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:06:11,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 91 [2023-11-29 05:06:11,258 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) [2023-11-29 05:06:11,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:06:11,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 91 [2023-11-29 05:06:11,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:06:11,788 INFO L124 PetriNetUnfolderBase]: 784/1795 cut-off events. [2023-11-29 05:06:11,788 INFO L125 PetriNetUnfolderBase]: For 510/532 co-relation queries the response was YES. [2023-11-29 05:06:11,790 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 11828 event pairs, 557 based on Foata normal form. 6/1614 useless extension candidates. Maximal degree in co-relation 3486. Up to 1242 conditions per place. [2023-11-29 05:06:11,795 INFO L140 encePairwiseOnDemand]: 87/91 looper letters, 59 selfloop transitions, 12 changer transitions 0/114 dead transitions. [2023-11-29 05:06:11,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 114 transitions, 748 flow [2023-11-29 05:06:11,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:06:11,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:06:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 390 transitions. [2023-11-29 05:06:11,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2023-11-29 05:06:11,797 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 390 transitions. [2023-11-29 05:06:11,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 390 transitions. [2023-11-29 05:06:11,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:06:11,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 390 transitions. [2023-11-29 05:06:11,799 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) [2023-11-29 05:06:11,800 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) [2023-11-29 05:06:11,800 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) [2023-11-29 05:06:11,800 INFO L175 Difference]: Start difference. First operand has 115 places, 96 transitions, 448 flow. Second operand 6 states and 390 transitions. [2023-11-29 05:06:11,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 114 transitions, 748 flow [2023-11-29 05:06:11,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 114 transitions, 696 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:06:11,804 INFO L231 Difference]: Finished difference. Result has 121 places, 102 transitions, 534 flow [2023-11-29 05:06:11,804 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} [2023-11-29 05:06:11,804 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 31 predicate places. [2023-11-29 05:06:11,804 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 102 transitions, 534 flow [2023-11-29 05:06:11,805 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) [2023-11-29 05:06:11,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:06:11,805 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:06:11,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-11-29 05:06:12,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:06:12,005 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:06:12,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:12,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1064317019, now seen corresponding path program 1 times [2023-11-29 05:06:12,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:06:12,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778808333] [2023-11-29 05:06:12,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:12,006 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 [2023-11-29 05:06:12,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:06:12,007 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:06:12,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:06:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:12,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 05:06:12,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:06:12,385 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 [2023-11-29 05:06:12,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:06:12,598 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 [2023-11-29 05:06:12,667 INFO L349 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2023-11-29 05:06:12,668 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 20 treesize of output 22 [2023-11-29 05:06:12,693 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 05:06:12,694 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 [2023-11-29 05:06:12,761 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 [2023-11-29 05:06:12,774 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 [2023-11-29 05:06:12,827 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 [2023-11-29 05:06:12,838 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 [2023-11-29 05:06:12,874 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 [2023-11-29 05:06:12,883 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 [2023-11-29 05:06:12,973 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 [2023-11-29 05:06:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:06:13,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:06:13,213 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_689 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_689) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_690 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_689 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_689) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_690) |c_~#c~0.base|) .cse1)))))) is different from false [2023-11-29 05:06:13,280 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_689 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_689) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_690 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_689 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_689) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_690) |c_~#c~0.base|) .cse1)))))) is different from false [2023-11-29 05:06:13,584 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:06:13,584 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 [2023-11-29 05:06:13,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:06:13,603 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 [2023-11-29 05:06:13,630 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:06:13,631 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 [2023-11-29 05:06:13,675 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:06:13,675 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 [2023-11-29 05:06:13,691 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 [2023-11-29 05:06:13,701 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 [2023-11-29 05:06:13,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:06:13,787 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 [2023-11-29 05:06:13,806 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 [2023-11-29 05:06:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-11-29 05:06:15,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:06:15,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778808333] [2023-11-29 05:06:15,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778808333] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:06:15,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:06:15,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-11-29 05:06:15,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032672172] [2023-11-29 05:06:15,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:06:15,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:06:15,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:06:15,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:06:15,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=175, Unknown=2, NotChecked=54, Total=272 [2023-11-29 05:06:16,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 91 [2023-11-29 05:06:16,308 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) [2023-11-29 05:06:16,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:06:16,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 91 [2023-11-29 05:06:16,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:06:20,971 INFO L124 PetriNetUnfolderBase]: 4046/6517 cut-off events. [2023-11-29 05:06:20,971 INFO L125 PetriNetUnfolderBase]: For 1230/1252 co-relation queries the response was YES. [2023-11-29 05:06:20,979 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 342. Compared 39794 event pairs, 3437 based on Foata normal form. 6/4026 useless extension candidates. Maximal degree in co-relation 14336. Up to 6364 conditions per place. [2023-11-29 05:06:21,008 INFO L140 encePairwiseOnDemand]: 81/91 looper letters, 77 selfloop transitions, 26 changer transitions 0/107 dead transitions. [2023-11-29 05:06:21,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 107 transitions, 754 flow [2023-11-29 05:06:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 05:06:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 05:06:21,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 155 transitions. [2023-11-29 05:06:21,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14194139194139194 [2023-11-29 05:06:21,011 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 155 transitions. [2023-11-29 05:06:21,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 155 transitions. [2023-11-29 05:06:21,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:06:21,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 155 transitions. [2023-11-29 05:06:21,012 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) [2023-11-29 05:06:21,014 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) [2023-11-29 05:06:21,014 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) [2023-11-29 05:06:21,014 INFO L175 Difference]: Start difference. First operand has 121 places, 102 transitions, 534 flow. Second operand 12 states and 155 transitions. [2023-11-29 05:06:21,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 107 transitions, 754 flow [2023-11-29 05:06:21,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 107 transitions, 736 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-11-29 05:06:21,021 INFO L231 Difference]: Finished difference. Result has 132 places, 103 transitions, 576 flow [2023-11-29 05:06:21,022 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} [2023-11-29 05:06:21,022 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 42 predicate places. [2023-11-29 05:06:21,022 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 103 transitions, 576 flow [2023-11-29 05:06:21,022 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) [2023-11-29 05:06:21,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:06:21,023 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:06:21,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-11-29 05:06:21,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:06:21,223 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:06:21,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:21,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1064317018, now seen corresponding path program 1 times [2023-11-29 05:06:21,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:06:21,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362569491] [2023-11-29 05:06:21,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:21,224 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 [2023-11-29 05:06:21,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:06:21,225 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:06:21,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:06:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:21,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 05:06:21,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:06:21,594 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 [2023-11-29 05:06:21,775 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 [2023-11-29 05:06:21,870 INFO L349 Elim1Store]: treesize reduction 86, result has 31.2 percent of original size [2023-11-29 05:06:21,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 59 [2023-11-29 05:06:21,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2023-11-29 05:06:22,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2023-11-29 05:06:22,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2023-11-29 05:06:22,167 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 27 treesize of output 15 [2023-11-29 05:06:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:06:22,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:06:22,384 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_799 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_799) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (_ bv1 1)))) is different from false [2023-11-29 05:06:22,491 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:06:22,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-11-29 05:06:22,515 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:06:22,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 55 [2023-11-29 05:06:22,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2023-11-29 05:06:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-29 05:06:23,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:06:23,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362569491] [2023-11-29 05:06:23,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362569491] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:06:23,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:06:23,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-11-29 05:06:23,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824959483] [2023-11-29 05:06:23,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:06:23,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:06:23,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:06:23,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:06:23,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=190, Unknown=6, NotChecked=28, Total=272 [2023-11-29 05:06:27,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:06:28,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 91 [2023-11-29 05:06:28,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 103 transitions, 576 flow. Second operand has 17 states, 17 states have (on average 16.235294117647058) internal successors, (276), 17 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:28,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:06:28,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 91 [2023-11-29 05:06:28,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:06:35,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:06:40,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:06:41,992 INFO L124 PetriNetUnfolderBase]: 2816/5003 cut-off events. [2023-11-29 05:06:41,993 INFO L125 PetriNetUnfolderBase]: For 1021/1043 co-relation queries the response was YES. [2023-11-29 05:06:42,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10788 conditions, 5003 events. 2816/5003 cut-off events. For 1021/1043 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 33426 event pairs, 2126 based on Foata normal form. 0/3671 useless extension candidates. Maximal degree in co-relation 10532. Up to 4043 conditions per place. [2023-11-29 05:06:42,018 INFO L140 encePairwiseOnDemand]: 80/91 looper letters, 102 selfloop transitions, 28 changer transitions 0/142 dead transitions. [2023-11-29 05:06:42,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 142 transitions, 934 flow [2023-11-29 05:06:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:06:42,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 05:06:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 290 transitions. [2023-11-29 05:06:42,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2451394759087067 [2023-11-29 05:06:42,020 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 290 transitions. [2023-11-29 05:06:42,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 290 transitions. [2023-11-29 05:06:42,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:06:42,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 290 transitions. [2023-11-29 05:06:42,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 22.307692307692307) internal successors, (290), 13 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:42,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:42,023 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:42,023 INFO L175 Difference]: Start difference. First operand has 132 places, 103 transitions, 576 flow. Second operand 13 states and 290 transitions. [2023-11-29 05:06:42,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 142 transitions, 934 flow [2023-11-29 05:06:42,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 142 transitions, 843 flow, removed 13 selfloop flow, removed 12 redundant places. [2023-11-29 05:06:42,030 INFO L231 Difference]: Finished difference. Result has 132 places, 104 transitions, 560 flow [2023-11-29 05:06:42,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=560, PETRI_PLACES=132, PETRI_TRANSITIONS=104} [2023-11-29 05:06:42,030 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 42 predicate places. [2023-11-29 05:06:42,030 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 104 transitions, 560 flow [2023-11-29 05:06:42,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 16.235294117647058) internal successors, (276), 17 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:42,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:06:42,031 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:06:42,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-11-29 05:06:42,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:06:42,232 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:06:42,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:42,232 INFO L85 PathProgramCache]: Analyzing trace with hash -162479198, now seen corresponding path program 1 times [2023-11-29 05:06:42,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:06:42,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635778820] [2023-11-29 05:06:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:42,233 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 [2023-11-29 05:06:42,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:06:42,234 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:06:42,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-29 05:06:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:42,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:06:42,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:06:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:06:42,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:06:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:06:43,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:06:43,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635778820] [2023-11-29 05:06:43,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635778820] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:06:43,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:06:43,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 05:06:43,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134100844] [2023-11-29 05:06:43,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:06:43,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:06:43,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:06:43,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:06:43,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:06:43,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 91 [2023-11-29 05:06:43,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 104 transitions, 560 flow. Second operand has 12 states, 12 states have (on average 59.916666666666664) internal successors, (719), 12 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:43,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:06:43,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 91 [2023-11-29 05:06:43,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:06:44,686 INFO L124 PetriNetUnfolderBase]: 784/1903 cut-off events. [2023-11-29 05:06:44,686 INFO L125 PetriNetUnfolderBase]: For 925/947 co-relation queries the response was YES. [2023-11-29 05:06:44,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4179 conditions, 1903 events. 784/1903 cut-off events. For 925/947 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11759 event pairs, 556 based on Foata normal form. 12/1734 useless extension candidates. Maximal degree in co-relation 3739. Up to 1242 conditions per place. [2023-11-29 05:06:44,693 INFO L140 encePairwiseOnDemand]: 87/91 looper letters, 95 selfloop transitions, 24 changer transitions 0/164 dead transitions. [2023-11-29 05:06:44,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 164 transitions, 1378 flow [2023-11-29 05:06:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 05:06:44,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 05:06:44,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 759 transitions. [2023-11-29 05:06:44,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.695054945054945 [2023-11-29 05:06:44,697 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 759 transitions. [2023-11-29 05:06:44,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 759 transitions. [2023-11-29 05:06:44,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:06:44,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 759 transitions. [2023-11-29 05:06:44,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 63.25) internal successors, (759), 12 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:44,702 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) [2023-11-29 05:06:44,703 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) [2023-11-29 05:06:44,703 INFO L175 Difference]: Start difference. First operand has 132 places, 104 transitions, 560 flow. Second operand 12 states and 759 transitions. [2023-11-29 05:06:44,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 164 transitions, 1378 flow [2023-11-29 05:06:44,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 164 transitions, 1215 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-11-29 05:06:44,712 INFO L231 Difference]: Finished difference. Result has 140 places, 118 transitions, 769 flow [2023-11-29 05:06:44,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=769, PETRI_PLACES=140, PETRI_TRANSITIONS=118} [2023-11-29 05:06:44,713 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 50 predicate places. [2023-11-29 05:06:44,713 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 118 transitions, 769 flow [2023-11-29 05:06:44,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 59.916666666666664) internal successors, (719), 12 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:44,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:06:44,714 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:06:44,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-11-29 05:06:44,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:06:44,915 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:06:44,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:44,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1020707970, now seen corresponding path program 2 times [2023-11-29 05:06:44,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:06:44,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552097647] [2023-11-29 05:06:44,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:06:44,916 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 [2023-11-29 05:06:44,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:06:44,917 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:06:44,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-29 05:06:47,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:06:47,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:06:47,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:06:47,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:06:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 1 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:06:47,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:06:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 1 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:06:48,274 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:06:48,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552097647] [2023-11-29 05:06:48,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552097647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:06:48,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:06:48,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-11-29 05:06:48,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633566089] [2023-11-29 05:06:48,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:06:48,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 05:06:48,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:06:48,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 05:06:48,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:06:48,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 91 [2023-11-29 05:06:48,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 118 transitions, 769 flow. Second operand has 24 states, 24 states have (on average 60.458333333333336) internal successors, (1451), 24 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:48,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:06:48,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 91 [2023-11-29 05:06:48,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:06:52,939 INFO L124 PetriNetUnfolderBase]: 784/2143 cut-off events. [2023-11-29 05:06:52,939 INFO L125 PetriNetUnfolderBase]: For 2512/2534 co-relation queries the response was YES. [2023-11-29 05:06:52,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4980 conditions, 2143 events. 784/2143 cut-off events. For 2512/2534 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11797 event pairs, 556 based on Foata normal form. 24/1986 useless extension candidates. Maximal degree in co-relation 4131. Up to 1242 conditions per place. [2023-11-29 05:06:52,947 INFO L140 encePairwiseOnDemand]: 87/91 looper letters, 167 selfloop transitions, 48 changer transitions 0/260 dead transitions. [2023-11-29 05:06:52,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 260 transitions, 2507 flow [2023-11-29 05:06:52,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 05:06:52,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 05:06:52,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1497 transitions. [2023-11-29 05:06:52,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6854395604395604 [2023-11-29 05:06:52,950 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1497 transitions. [2023-11-29 05:06:52,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1497 transitions. [2023-11-29 05:06:52,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:06:52,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1497 transitions. [2023-11-29 05:06:52,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 62.375) internal successors, (1497), 24 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:52,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 91.0) internal successors, (2275), 25 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:52,957 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 91.0) internal successors, (2275), 25 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:52,957 INFO L175 Difference]: Start difference. First operand has 140 places, 118 transitions, 769 flow. Second operand 24 states and 1497 transitions. [2023-11-29 05:06:52,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 260 transitions, 2507 flow [2023-11-29 05:06:52,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 260 transitions, 2495 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:06:52,967 INFO L231 Difference]: Finished difference. Result has 173 places, 144 transitions, 1349 flow [2023-11-29 05:06:52,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1349, PETRI_PLACES=173, PETRI_TRANSITIONS=144} [2023-11-29 05:06:52,968 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 83 predicate places. [2023-11-29 05:06:52,968 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 144 transitions, 1349 flow [2023-11-29 05:06:52,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 60.458333333333336) internal successors, (1451), 24 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:52,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:06:52,969 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1] [2023-11-29 05:06:52,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-11-29 05:06:53,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:06:53,169 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:06:53,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:53,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1663005106, now seen corresponding path program 1 times [2023-11-29 05:06:53,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:06:53,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220704589] [2023-11-29 05:06:53,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:53,171 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 [2023-11-29 05:06:53,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:06:53,172 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:06:53,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-29 05:07:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:07:02,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 3023 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 05:07:02,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:07:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 2 proven. 2101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:07:03,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:07:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 2 proven. 2101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:07:05,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:07:05,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220704589] [2023-11-29 05:07:05,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220704589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:07:05,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:07:05,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2023-11-29 05:07:05,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359241608] [2023-11-29 05:07:05,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:07:05,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-29 05:07:05,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:07:05,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-29 05:07:05,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=1754, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 05:07:05,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 91 [2023-11-29 05:07:05,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 144 transitions, 1349 flow. Second operand has 48 states, 48 states have (on average 60.729166666666664) internal successors, (2915), 48 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:07:05,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:07:05,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 91 [2023-11-29 05:07:05,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:07:16,760 INFO L124 PetriNetUnfolderBase]: 784/2303 cut-off events. [2023-11-29 05:07:16,760 INFO L125 PetriNetUnfolderBase]: For 6259/6281 co-relation queries the response was YES. [2023-11-29 05:07:16,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5743 conditions, 2303 events. 784/2303 cut-off events. For 6259/6281 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11834 event pairs, 556 based on Foata normal form. 16/2138 useless extension candidates. Maximal degree in co-relation 4502. Up to 1242 conditions per place. [2023-11-29 05:07:16,768 INFO L140 encePairwiseOnDemand]: 87/91 looper letters, 215 selfloop transitions, 64 changer transitions 0/324 dead transitions. [2023-11-29 05:07:16,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 324 transitions, 3647 flow [2023-11-29 05:07:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 05:07:16,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-29 05:07:16,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1981 transitions. [2023-11-29 05:07:16,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6802884615384616 [2023-11-29 05:07:16,773 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1981 transitions. [2023-11-29 05:07:16,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1981 transitions. [2023-11-29 05:07:16,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:07:16,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1981 transitions. [2023-11-29 05:07:16,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 61.90625) internal successors, (1981), 32 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:07:16,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 91.0) internal successors, (3003), 33 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:07:16,784 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 91.0) internal successors, (3003), 33 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:07:16,784 INFO L175 Difference]: Start difference. First operand has 173 places, 144 transitions, 1349 flow. Second operand 32 states and 1981 transitions. [2023-11-29 05:07:16,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 324 transitions, 3647 flow [2023-11-29 05:07:16,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 324 transitions, 3611 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-11-29 05:07:16,815 INFO L231 Difference]: Finished difference. Result has 204 places, 162 transitions, 1857 flow [2023-11-29 05:07:16,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1857, PETRI_PLACES=204, PETRI_TRANSITIONS=162} [2023-11-29 05:07:16,816 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 114 predicate places. [2023-11-29 05:07:16,816 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 162 transitions, 1857 flow [2023-11-29 05:07:16,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 60.729166666666664) internal successors, (2915), 48 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:07:16,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:07:16,819 INFO L208 CegarLoopForPetriNet]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 2, 1, 1, 1, 1, 1] [2023-11-29 05:07:16,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-11-29 05:07:17,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:07:17,034 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-29 05:07:17,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:07:17,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1213461710, now seen corresponding path program 2 times [2023-11-29 05:07:17,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:07:17,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704063636] [2023-11-29 05:07:17,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:07:17,037 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 [2023-11-29 05:07:17,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:07:17,038 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:07:17,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50641db9-3e34-4f02-b0ab-478e3fb649a4/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process