./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 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_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:06:03,998 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:06:04,135 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:06:04,143 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:06:04,144 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:06:04,185 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:06:04,185 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:06:04,186 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:06:04,187 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:06:04,194 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:06:04,195 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:06:04,196 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:06:04,196 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:06:04,198 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:06:04,199 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:06:04,199 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:06:04,199 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:06:04,200 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:06:04,200 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:06:04,201 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:06:04,201 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:06:04,202 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:06:04,202 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:06:04,203 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:06:04,203 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:06:04,204 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:06:04,205 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:06:04,205 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:06:04,205 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:06:04,206 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:06:04,207 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:06:04,207 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:06:04,208 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:06:04,208 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:06:04,208 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:06:04,208 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:06:04,209 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:06:04,209 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:06:04,209 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:06:04,209 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_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d [2023-11-21 22:06:04,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:06:04,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:06:04,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:06:04,558 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:06:04,558 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:06:04,559 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-21 22:06:07,594 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:06:07,838 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:06:07,839 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-21 22:06:07,849 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/data/6a70f07fb/1ff9fdbba2ce46ae933d04f019ddcda8/FLAG821adb4ab [2023-11-21 22:06:07,865 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/data/6a70f07fb/1ff9fdbba2ce46ae933d04f019ddcda8 [2023-11-21 22:06:07,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:06:07,870 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:06:07,872 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:06:07,876 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:06:07,882 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:06:07,885 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:06:07" (1/1) ... [2023-11-21 22:06:07,886 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@426edf2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:07, skipping insertion in model container [2023-11-21 22:06:07,887 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:06:07" (1/1) ... [2023-11-21 22:06:07,923 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:06:08,126 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:06:08,141 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-21 22:06:08,142 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@314c42f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:08, skipping insertion in model container [2023-11-21 22:06:08,142 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:06:08,142 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-21 22:06:08,145 INFO L158 Benchmark]: Toolchain (without parser) took 273.56ms. Allocated memory is still 157.3MB. Free memory was 121.0MB in the beginning and 110.7MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-21 22:06:08,145 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 119.5MB. Free memory is still 92.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 22:06:08,146 INFO L158 Benchmark]: CACSL2BoogieTranslator took 270.70ms. Allocated memory is still 157.3MB. Free memory was 120.5MB in the beginning and 110.7MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-21 22:06:08,148 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 119.5MB. Free memory is still 92.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 270.70ms. Allocated memory is still 157.3MB. Free memory was 120.5MB in the beginning and 110.7MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: 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_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:06:10,811 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:06:10,896 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-21 22:06:10,906 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:06:10,906 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:06:10,960 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:06:10,961 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:06:10,961 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:06:10,963 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:06:10,968 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:06:10,969 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:06:10,969 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:06:10,970 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:06:10,972 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:06:10,972 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:06:10,972 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:06:10,973 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:06:10,973 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:06:10,974 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:06:10,975 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:06:10,975 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:06:10,976 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:06:10,976 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:06:10,977 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-21 22:06:10,977 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-21 22:06:10,978 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:06:10,978 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:06:10,979 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:06:10,980 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:06:10,980 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:06:10,981 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:06:10,982 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:06:10,982 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:06:10,983 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:06:10,983 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:06:10,983 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-21 22:06:10,983 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-21 22:06:10,984 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:06:10,984 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:06:10,985 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:06:10,985 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:06:10,986 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-21 22:06:10,986 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_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d [2023-11-21 22:06:11,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:06:11,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:06:11,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:06:11,476 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:06:11,477 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:06:11,479 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-21 22:06:14,763 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:06:15,064 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:06:15,065 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-21 22:06:15,073 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/data/59628e643/738cb7013828422cb42a782655878eaa/FLAGb1730360f [2023-11-21 22:06:15,086 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/data/59628e643/738cb7013828422cb42a782655878eaa [2023-11-21 22:06:15,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:06:15,090 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:06:15,091 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:06:15,092 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:06:15,097 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:06:15,098 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:06:15" (1/1) ... [2023-11-21 22:06:15,099 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eb560e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:15, skipping insertion in model container [2023-11-21 22:06:15,100 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:06:15" (1/1) ... [2023-11-21 22:06:15,129 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:06:15,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:06:15,357 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-21 22:06:15,362 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:06:15,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:06:15,400 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:06:15,446 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:06:15,471 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:06:15,472 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:06:15,481 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:06:15,481 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:15 WrapperNode [2023-11-21 22:06:15,482 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:06:15,483 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:06:15,483 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:06:15,484 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:06:15,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:15" (1/1) ... [2023-11-21 22:06:15,519 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:15" (1/1) ... [2023-11-21 22:06:15,569 INFO L138 Inliner]: procedures = 27, calls = 40, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 169 [2023-11-21 22:06:15,569 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:06:15,571 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:06:15,571 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:06:15,571 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:06:15,583 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:15" (1/1) ... [2023-11-21 22:06:15,583 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:15" (1/1) ... [2023-11-21 22:06:15,605 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:15" (1/1) ... [2023-11-21 22:06:15,607 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:15" (1/1) ... [2023-11-21 22:06:15,618 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:15" (1/1) ... [2023-11-21 22:06:15,636 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:15" (1/1) ... [2023-11-21 22:06:15,661 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:15" (1/1) ... [2023-11-21 22:06:15,663 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:15" (1/1) ... [2023-11-21 22:06:15,667 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:06:15,668 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:06:15,668 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:06:15,669 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:06:15,670 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:15" (1/1) ... [2023-11-21 22:06:15,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:06:15,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:15,747 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:06:15,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:06:15,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:06:15,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-21 22:06:15,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:06:15,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-21 22:06:15,804 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-21 22:06:15,805 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-21 22:06:15,805 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-21 22:06:15,805 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-21 22:06:15,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-21 22:06:15,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-21 22:06:15,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:06:15,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:06:15,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:06:15,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:06:15,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-21 22:06:15,811 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 22:06:15,993 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:06:15,998 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:06:16,529 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:06:17,016 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:06:17,016 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 22:06:17,018 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:06:17 BoogieIcfgContainer [2023-11-21 22:06:17,018 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:06:17,022 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:06:17,023 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:06:17,027 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:06:17,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:06:15" (1/3) ... [2023-11-21 22:06:17,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac65b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:06:17, skipping insertion in model container [2023-11-21 22:06:17,029 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:15" (2/3) ... [2023-11-21 22:06:17,031 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac65b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:06:17, skipping insertion in model container [2023-11-21 22:06:17,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:06:17" (3/3) ... [2023-11-21 22:06:17,033 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-11-21 22:06:17,052 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:06:17,052 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-21 22:06:17,052 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 22:06:17,127 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-21 22:06:17,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 53 transitions, 120 flow [2023-11-21 22:06:17,221 INFO L124 PetriNetUnfolderBase]: 4/51 cut-off events. [2023-11-21 22:06:17,221 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-21 22:06:17,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 51 events. 4/51 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 113 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2023-11-21 22:06:17,233 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 53 transitions, 120 flow [2023-11-21 22:06:17,239 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 50 transitions, 112 flow [2023-11-21 22:06:17,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:06:17,265 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;@26c07f0b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:06:17,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-21 22:06:17,269 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:06:17,269 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-21 22:06:17,269 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:06:17,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:17,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:06:17,271 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 22:06:17,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:17,278 INFO L85 PathProgramCache]: Analyzing trace with hash 509752, now seen corresponding path program 1 times [2023-11-21 22:06:17,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:06:17,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406463631] [2023-11-21 22:06:17,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:17,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:17,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:06:17,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:06:17,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-21 22:06:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:17,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:06:17,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:17,548 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 11 treesize of output 7 [2023-11-21 22:06:17,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:17,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 22:06:17,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:17,587 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 6 treesize of output 1 [2023-11-21 22:06:17,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:17,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 22:06:17,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:17,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 22:06:17,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:17,617 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 6 treesize of output 1 [2023-11-21 22:06:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:17,628 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:06:17,629 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:06:17,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406463631] [2023-11-21 22:06:17,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406463631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:17,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:17,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:06:17,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703905313] [2023-11-21 22:06:17,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:17,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:06:17,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:06:17,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:06:17,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:06:17,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2023-11-21 22:06:17,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:17,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:17,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2023-11-21 22:06:17,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:18,025 INFO L124 PetriNetUnfolderBase]: 238/514 cut-off events. [2023-11-21 22:06:18,026 INFO L125 PetriNetUnfolderBase]: For 29/31 co-relation queries the response was YES. [2023-11-21 22:06:18,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 938 conditions, 514 events. 238/514 cut-off events. For 29/31 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2523 event pairs, 201 based on Foata normal form. 22/370 useless extension candidates. Maximal degree in co-relation 851. Up to 388 conditions per place. [2023-11-21 22:06:18,036 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 25 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-11-21 22:06:18,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 46 transitions, 158 flow [2023-11-21 22:06:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:06:18,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:06:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2023-11-21 22:06:18,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6037735849056604 [2023-11-21 22:06:18,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 96 transitions. [2023-11-21 22:06:18,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 96 transitions. [2023-11-21 22:06:18,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:18,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 96 transitions. [2023-11-21 22:06:18,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:18,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:18,061 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:18,063 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 112 flow. Second operand 3 states and 96 transitions. [2023-11-21 22:06:18,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 46 transitions, 158 flow [2023-11-21 22:06:18,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-21 22:06:18,088 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 100 flow [2023-11-21 22:06:18,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-11-21 22:06:18,094 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -5 predicate places. [2023-11-21 22:06:18,094 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 100 flow [2023-11-21 22:06:18,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:18,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:18,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:06:18,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-21 22:06:18,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:18,297 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 22:06:18,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:18,298 INFO L85 PathProgramCache]: Analyzing trace with hash 509753, now seen corresponding path program 1 times [2023-11-21 22:06:18,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:06:18,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001006561] [2023-11-21 22:06:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:18,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:18,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:06:18,301 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:06:18,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-21 22:06:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:18,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 22:06:18,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:18,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-21 22:06:18,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:18,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 22:06:18,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:18,460 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 8 treesize of output 1 [2023-11-21 22:06:18,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:18,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 22:06:18,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:18,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 22:06:18,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:18,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 22:06:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:18,627 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:06:18,627 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:06:18,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001006561] [2023-11-21 22:06:18,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001006561] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:18,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:18,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:06:18,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215623915] [2023-11-21 22:06:18,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:18,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:06:18,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:06:18,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:06:18,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:06:18,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2023-11-21 22:06:18,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:18,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:18,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2023-11-21 22:06:18,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:19,140 INFO L124 PetriNetUnfolderBase]: 239/517 cut-off events. [2023-11-21 22:06:19,141 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-11-21 22:06:19,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 928 conditions, 517 events. 239/517 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2521 event pairs, 201 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 906. Up to 393 conditions per place. [2023-11-21 22:06:19,148 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 27 selfloop transitions, 4 changer transitions 0/49 dead transitions. [2023-11-21 22:06:19,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 170 flow [2023-11-21 22:06:19,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:06:19,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:06:19,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2023-11-21 22:06:19,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2023-11-21 22:06:19,151 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 120 transitions. [2023-11-21 22:06:19,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 120 transitions. [2023-11-21 22:06:19,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:19,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 120 transitions. [2023-11-21 22:06:19,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:19,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:19,155 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:19,155 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 100 flow. Second operand 4 states and 120 transitions. [2023-11-21 22:06:19,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 170 flow [2023-11-21 22:06:19,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:06:19,157 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 123 flow [2023-11-21 22:06:19,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2023-11-21 22:06:19,159 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -2 predicate places. [2023-11-21 22:06:19,159 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 123 flow [2023-11-21 22:06:19,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:19,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:19,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:06:19,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:19,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:19,362 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 22:06:19,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:19,363 INFO L85 PathProgramCache]: Analyzing trace with hash 509796, now seen corresponding path program 1 times [2023-11-21 22:06:19,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:06:19,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139650956] [2023-11-21 22:06:19,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:19,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:19,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:06:19,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:06:19,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-21 22:06:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:19,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 22:06:19,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:19,527 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-21 22:06:19,528 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 24 treesize of output 22 [2023-11-21 22:06:19,554 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 22:06:19,555 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 19 treesize of output 22 [2023-11-21 22:06:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:19,639 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:06:19,639 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:06:19,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139650956] [2023-11-21 22:06:19,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139650956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:19,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:19,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:06:19,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435545835] [2023-11-21 22:06:19,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:19,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:06:19,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:06:19,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:06:19,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:06:19,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2023-11-21 22:06:19,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:19,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:19,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2023-11-21 22:06:19,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:19,966 INFO L124 PetriNetUnfolderBase]: 379/718 cut-off events. [2023-11-21 22:06:19,966 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-21 22:06:19,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1339 conditions, 718 events. 379/718 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3529 event pairs, 324 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 1315. Up to 594 conditions per place. [2023-11-21 22:06:19,974 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 31 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-11-21 22:06:19,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 183 flow [2023-11-21 22:06:19,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:06:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:06:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-21 22:06:19,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534591194968553 [2023-11-21 22:06:19,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-21 22:06:19,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-21 22:06:19,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:19,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-21 22:06:19,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:19,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:19,985 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:19,986 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 123 flow. Second operand 3 states and 88 transitions. [2023-11-21 22:06:19,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 183 flow [2023-11-21 22:06:19,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 47 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:06:19,989 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 118 flow [2023-11-21 22:06:19,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-11-21 22:06:19,992 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -3 predicate places. [2023-11-21 22:06:19,992 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 118 flow [2023-11-21 22:06:19,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:19,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:19,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:06:20,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:20,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:20,195 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 22:06:20,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:20,196 INFO L85 PathProgramCache]: Analyzing trace with hash 509797, now seen corresponding path program 1 times [2023-11-21 22:06:20,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:06:20,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384213661] [2023-11-21 22:06:20,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:20,197 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:20,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:06:20,198 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:06:20,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-21 22:06:20,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:20,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:06:20,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:20,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:20,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:20,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-21 22:06:20,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-21 22:06:20,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:20,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-21 22:06:20,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:20,382 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 5 treesize of output 3 [2023-11-21 22:06:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:20,443 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:06:20,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:06:20,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384213661] [2023-11-21 22:06:20,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384213661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:20,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:20,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:06:20,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965973018] [2023-11-21 22:06:20,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:20,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:06:20,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:06:20,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:06:20,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:06:20,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2023-11-21 22:06:20,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:20,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:20,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2023-11-21 22:06:20,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:20,712 INFO L124 PetriNetUnfolderBase]: 239/497 cut-off events. [2023-11-21 22:06:20,712 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-11-21 22:06:20,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 497 events. 239/497 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2288 event pairs, 201 based on Foata normal form. 71/422 useless extension candidates. Maximal degree in co-relation 907. Up to 393 conditions per place. [2023-11-21 22:06:20,717 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 29 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-21 22:06:20,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 45 transitions, 174 flow [2023-11-21 22:06:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:06:20,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:06:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2023-11-21 22:06:20,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5786163522012578 [2023-11-21 22:06:20,719 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2023-11-21 22:06:20,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2023-11-21 22:06:20,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:20,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2023-11-21 22:06:20,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:20,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:20,721 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:20,721 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 118 flow. Second operand 3 states and 92 transitions. [2023-11-21 22:06:20,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 45 transitions, 174 flow [2023-11-21 22:06:20,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 45 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:06:20,723 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 115 flow [2023-11-21 22:06:20,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-11-21 22:06:20,725 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -4 predicate places. [2023-11-21 22:06:20,725 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 115 flow [2023-11-21 22:06:20,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:20,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:20,725 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-21 22:06:20,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:20,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:20,928 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 22:06:20,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:20,929 INFO L85 PathProgramCache]: Analyzing trace with hash 489889393, now seen corresponding path program 1 times [2023-11-21 22:06:20,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:06:20,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125099753] [2023-11-21 22:06:20,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:20,930 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:20,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:06:20,931 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:06:20,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-21 22:06:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:20,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:06:21,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:21,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-21 22:06:21,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:21,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 22:06:21,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:21,052 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 8 treesize of output 1 [2023-11-21 22:06:21,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:21,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 22:06:21,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:21,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 22:06:21,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:21,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 22:06:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:21,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:06:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:21,706 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:06:21,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125099753] [2023-11-21 22:06:21,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125099753] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:06:21,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:06:21,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-21 22:06:21,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571592482] [2023-11-21 22:06:21,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:06:21,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:06:21,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:06:21,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:06:21,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:06:22,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2023-11-21 22:06:22,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 115 flow. Second operand has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:22,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:22,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2023-11-21 22:06:22,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:23,338 INFO L124 PetriNetUnfolderBase]: 242/506 cut-off events. [2023-11-21 22:06:23,338 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-11-21 22:06:23,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 506 events. 242/506 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2349 event pairs, 201 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 935. Up to 396 conditions per place. [2023-11-21 22:06:23,343 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 27 selfloop transitions, 13 changer transitions 0/54 dead transitions. [2023-11-21 22:06:23,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 231 flow [2023-11-21 22:06:23,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:06:23,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-21 22:06:23,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 263 transitions. [2023-11-21 22:06:23,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962264150943396 [2023-11-21 22:06:23,347 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 263 transitions. [2023-11-21 22:06:23,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 263 transitions. [2023-11-21 22:06:23,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:23,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 263 transitions. [2023-11-21 22:06:23,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 26.3) internal successors, (263), 10 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:23,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:23,352 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:23,352 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 115 flow. Second operand 10 states and 263 transitions. [2023-11-21 22:06:23,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 231 flow [2023-11-21 22:06:23,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:06:23,355 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 194 flow [2023-11-21 22:06:23,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=194, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-11-21 22:06:23,356 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2023-11-21 22:06:23,357 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 194 flow [2023-11-21 22:06:23,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:23,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:23,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 22:06:23,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:23,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:23,565 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 22:06:23,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:23,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1992031286, now seen corresponding path program 1 times [2023-11-21 22:06:23,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:06:23,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282826287] [2023-11-21 22:06:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:23,567 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:23,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:06:23,568 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:06:23,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-21 22:06:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:23,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 22:06:23,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:23,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:23,679 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 11 treesize of output 5 [2023-11-21 22:06:23,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:23,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:23,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 22:06:23,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:23,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:23,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 22:06:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:23,777 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:06:23,777 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:06:23,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282826287] [2023-11-21 22:06:23,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282826287] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:23,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:23,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:06:23,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148756840] [2023-11-21 22:06:23,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:23,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:06:23,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:06:23,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:06:23,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:06:23,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2023-11-21 22:06:23,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:23,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:23,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2023-11-21 22:06:23,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:24,006 INFO L124 PetriNetUnfolderBase]: 242/498 cut-off events. [2023-11-21 22:06:24,006 INFO L125 PetriNetUnfolderBase]: For 13/15 co-relation queries the response was YES. [2023-11-21 22:06:24,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 961 conditions, 498 events. 242/498 cut-off events. For 13/15 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2305 event pairs, 201 based on Foata normal form. 17/377 useless extension candidates. Maximal degree in co-relation 947. Up to 402 conditions per place. [2023-11-21 22:06:24,010 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 38 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-11-21 22:06:24,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 268 flow [2023-11-21 22:06:24,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:06:24,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:06:24,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2023-11-21 22:06:24,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5786163522012578 [2023-11-21 22:06:24,012 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2023-11-21 22:06:24,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2023-11-21 22:06:24,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:24,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2023-11-21 22:06:24,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:24,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:24,014 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:24,015 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 194 flow. Second operand 3 states and 92 transitions. [2023-11-21 22:06:24,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 268 flow [2023-11-21 22:06:24,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 238 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-21 22:06:24,019 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 162 flow [2023-11-21 22:06:24,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2023-11-21 22:06:24,020 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2023-11-21 22:06:24,020 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 162 flow [2023-11-21 22:06:24,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:24,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:24,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 22:06:24,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:24,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:24,223 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 22:06:24,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:24,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1992031287, now seen corresponding path program 1 times [2023-11-21 22:06:24,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:06:24,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855490473] [2023-11-21 22:06:24,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:24,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:24,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:06:24,227 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:06:24,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-21 22:06:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:24,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:06:24,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:24,339 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 22:06:24,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-21 22:06:24,361 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 22:06:24,362 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-21 22:06:24,386 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 22:06:24,391 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-21 22:06:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:24,501 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:06:24,501 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:06:24,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855490473] [2023-11-21 22:06:24,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855490473] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:24,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:24,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:06:24,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881921799] [2023-11-21 22:06:24,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:24,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:06:24,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:06:24,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:06:24,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:06:24,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2023-11-21 22:06:24,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:24,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:24,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2023-11-21 22:06:24,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:24,755 INFO L124 PetriNetUnfolderBase]: 258/514 cut-off events. [2023-11-21 22:06:24,755 INFO L125 PetriNetUnfolderBase]: For 9/11 co-relation queries the response was YES. [2023-11-21 22:06:24,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 514 events. 258/514 cut-off events. For 9/11 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2343 event pairs, 216 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 982. Up to 435 conditions per place. [2023-11-21 22:06:24,760 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 40 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-11-21 22:06:24,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 50 transitions, 240 flow [2023-11-21 22:06:24,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:06:24,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:06:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-21 22:06:24,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534591194968553 [2023-11-21 22:06:24,762 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-21 22:06:24,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-21 22:06:24,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:24,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-21 22:06:24,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:24,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:24,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:24,764 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 162 flow. Second operand 3 states and 88 transitions. [2023-11-21 22:06:24,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 50 transitions, 240 flow [2023-11-21 22:06:24,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 50 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:06:24,767 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 159 flow [2023-11-21 22:06:24,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2023-11-21 22:06:24,768 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-11-21 22:06:24,769 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 159 flow [2023-11-21 22:06:24,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:24,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:24,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:24,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-21 22:06:24,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:24,972 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 22:06:24,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:24,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1623414803, now seen corresponding path program 1 times [2023-11-21 22:06:24,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:06:24,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248946596] [2023-11-21 22:06:24,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:24,973 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:24,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:06:24,974 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:06:24,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-21 22:06:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 22:06:25,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:25,067 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 11 treesize of output 7 [2023-11-21 22:06:25,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:25,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 22:06:25,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:25,096 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 6 treesize of output 1 [2023-11-21 22:06:25,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:25,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 22:06:25,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:25,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 22:06:25,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:25,145 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 6 treesize of output 1 [2023-11-21 22:06:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:25,173 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:06:25,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:06:25,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248946596] [2023-11-21 22:06:25,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248946596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:25,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:25,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:06:25,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441326302] [2023-11-21 22:06:25,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:25,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:06:25,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:06:25,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:06:25,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:06:25,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2023-11-21 22:06:25,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 159 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:25,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:25,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2023-11-21 22:06:25,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:25,431 INFO L124 PetriNetUnfolderBase]: 171/358 cut-off events. [2023-11-21 22:06:25,431 INFO L125 PetriNetUnfolderBase]: For 10/12 co-relation queries the response was YES. [2023-11-21 22:06:25,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 358 events. 171/358 cut-off events. For 10/12 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1471 event pairs, 136 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 675. Up to 275 conditions per place. [2023-11-21 22:06:25,435 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 30 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2023-11-21 22:06:25,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 225 flow [2023-11-21 22:06:25,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:06:25,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:06:25,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2023-11-21 22:06:25,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424528301886793 [2023-11-21 22:06:25,437 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 115 transitions. [2023-11-21 22:06:25,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 115 transitions. [2023-11-21 22:06:25,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:25,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 115 transitions. [2023-11-21 22:06:25,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:25,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:25,439 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:25,439 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 159 flow. Second operand 4 states and 115 transitions. [2023-11-21 22:06:25,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 225 flow [2023-11-21 22:06:25,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 47 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:06:25,442 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 164 flow [2023-11-21 22:06:25,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-11-21 22:06:25,443 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-11-21 22:06:25,444 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 164 flow [2023-11-21 22:06:25,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:25,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:25,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:25,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-21 22:06:25,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:25,651 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 22:06:25,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:25,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1623414802, now seen corresponding path program 1 times [2023-11-21 22:06:25,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:06:25,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962069190] [2023-11-21 22:06:25,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:25,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:25,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:06:25,653 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:06:25,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-21 22:06:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 22:06:25,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:25,790 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:06:25,790 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:06:25,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962069190] [2023-11-21 22:06:25,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962069190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:25,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:25,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:06:25,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952653820] [2023-11-21 22:06:25,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:25,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:06:25,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:06:25,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:06:25,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:06:25,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 53 [2023-11-21 22:06:25,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:25,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:25,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 53 [2023-11-21 22:06:25,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:26,061 INFO L124 PetriNetUnfolderBase]: 183/403 cut-off events. [2023-11-21 22:06:26,062 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-21 22:06:26,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 403 events. 183/403 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1729 event pairs, 149 based on Foata normal form. 18/359 useless extension candidates. Maximal degree in co-relation 760. Up to 284 conditions per place. [2023-11-21 22:06:26,065 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 33 selfloop transitions, 2 changer transitions 8/54 dead transitions. [2023-11-21 22:06:26,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 266 flow [2023-11-21 22:06:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:06:26,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:06:26,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2023-11-21 22:06:26,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6226415094339622 [2023-11-21 22:06:26,067 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 132 transitions. [2023-11-21 22:06:26,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 132 transitions. [2023-11-21 22:06:26,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:26,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 132 transitions. [2023-11-21 22:06:26,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:26,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:26,070 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:26,070 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 164 flow. Second operand 4 states and 132 transitions. [2023-11-21 22:06:26,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 266 flow [2023-11-21 22:06:26,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 259 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:06:26,073 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 168 flow [2023-11-21 22:06:26,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2023-11-21 22:06:26,074 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2023-11-21 22:06:26,075 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 168 flow [2023-11-21 22:06:26,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:26,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:26,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:26,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:26,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:26,277 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 22:06:26,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:26,278 INFO L85 PathProgramCache]: Analyzing trace with hash -67525850, now seen corresponding path program 1 times [2023-11-21 22:06:26,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:06:26,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519880804] [2023-11-21 22:06:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:26,279 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:26,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:06:26,280 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:06:26,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-21 22:06:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:26,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-21 22:06:26,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:26,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-21 22:06:26,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:26,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 22:06:26,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:26,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 22:06:26,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:26,449 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 8 treesize of output 1 [2023-11-21 22:06:26,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:26,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 22:06:26,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:26,479 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 8 treesize of output 1 [2023-11-21 22:06:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:26,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:06:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:27,567 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:06:27,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519880804] [2023-11-21 22:06:27,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519880804] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:06:27,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:06:27,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-21 22:06:27,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982956527] [2023-11-21 22:06:27,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:06:27,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:06:27,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:06:27,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:06:27,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:06:29,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2023-11-21 22:06:29,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 168 flow. Second operand has 10 states, 10 states have (on average 23.4) internal successors, (234), 10 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:29,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:29,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2023-11-21 22:06:29,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:30,762 INFO L124 PetriNetUnfolderBase]: 382/815 cut-off events. [2023-11-21 22:06:30,763 INFO L125 PetriNetUnfolderBase]: For 110/112 co-relation queries the response was YES. [2023-11-21 22:06:30,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1679 conditions, 815 events. 382/815 cut-off events. For 110/112 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4145 event pairs, 302 based on Foata normal form. 0/726 useless extension candidates. Maximal degree in co-relation 1662. Up to 274 conditions per place. [2023-11-21 22:06:30,770 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 59 selfloop transitions, 11 changer transitions 0/80 dead transitions. [2023-11-21 22:06:30,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 80 transitions, 396 flow [2023-11-21 22:06:30,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:06:30,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-21 22:06:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 273 transitions. [2023-11-21 22:06:30,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5723270440251572 [2023-11-21 22:06:30,774 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 273 transitions. [2023-11-21 22:06:30,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 273 transitions. [2023-11-21 22:06:30,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:30,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 273 transitions. [2023-11-21 22:06:30,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 30.333333333333332) internal successors, (273), 9 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:30,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 53.0) internal successors, (530), 10 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:30,777 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 53.0) internal successors, (530), 10 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:30,778 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 168 flow. Second operand 9 states and 273 transitions. [2023-11-21 22:06:30,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 80 transitions, 396 flow [2023-11-21 22:06:30,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 80 transitions, 392 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:06:30,781 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 201 flow [2023-11-21 22:06:30,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=201, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2023-11-21 22:06:30,782 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 11 predicate places. [2023-11-21 22:06:30,782 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 201 flow [2023-11-21 22:06:30,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.4) internal successors, (234), 10 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:30,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:30,783 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-21 22:06:30,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:30,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:30,986 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 22:06:30,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:30,986 INFO L85 PathProgramCache]: Analyzing trace with hash 453873689, now seen corresponding path program 2 times [2023-11-21 22:06:30,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:06:30,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577317929] [2023-11-21 22:06:30,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:06:30,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:30,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:06:30,988 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:06:30,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-21 22:06:31,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:06:31,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:06:31,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:06:31,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:31,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-21 22:06:31,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:31,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 22:06:31,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:31,159 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 8 treesize of output 1 [2023-11-21 22:06:31,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:31,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 22:06:31,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:31,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 22:06:31,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:31,193 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 8 treesize of output 1 [2023-11-21 22:06:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:31,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:06:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:32,574 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:06:32,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577317929] [2023-11-21 22:06:32,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577317929] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:06:32,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:06:32,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-21 22:06:32,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753076902] [2023-11-21 22:06:32,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:06:32,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 22:06:32,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:06:32,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 22:06:32,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-21 22:06:34,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2023-11-21 22:06:34,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 201 flow. Second operand has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:34,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:34,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2023-11-21 22:06:34,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:38,502 INFO L124 PetriNetUnfolderBase]: 386/826 cut-off events. [2023-11-21 22:06:38,502 INFO L125 PetriNetUnfolderBase]: For 359/365 co-relation queries the response was YES. [2023-11-21 22:06:38,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 826 events. 386/826 cut-off events. For 359/365 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4276 event pairs, 302 based on Foata normal form. 6/783 useless extension candidates. Maximal degree in co-relation 1832. Up to 633 conditions per place. [2023-11-21 22:06:38,509 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 24 selfloop transitions, 30 changer transitions 0/64 dead transitions. [2023-11-21 22:06:38,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 64 transitions, 423 flow [2023-11-21 22:06:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-21 22:06:38,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-21 22:06:38,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 544 transitions. [2023-11-21 22:06:38,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4665523156089194 [2023-11-21 22:06:38,514 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 544 transitions. [2023-11-21 22:06:38,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 544 transitions. [2023-11-21 22:06:38,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:38,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 544 transitions. [2023-11-21 22:06:38,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 24.727272727272727) internal successors, (544), 22 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:38,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 53.0) internal successors, (1219), 23 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:38,521 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 53.0) internal successors, (1219), 23 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:38,521 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 201 flow. Second operand 22 states and 544 transitions. [2023-11-21 22:06:38,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 64 transitions, 423 flow [2023-11-21 22:06:38,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 64 transitions, 413 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-21 22:06:38,526 INFO L231 Difference]: Finished difference. Result has 87 places, 64 transitions, 395 flow [2023-11-21 22:06:38,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=395, PETRI_PLACES=87, PETRI_TRANSITIONS=64} [2023-11-21 22:06:38,527 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 34 predicate places. [2023-11-21 22:06:38,528 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 64 transitions, 395 flow [2023-11-21 22:06:38,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:38,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:38,528 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:38,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:38,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:38,731 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 22:06:38,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:38,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1099759410, now seen corresponding path program 2 times [2023-11-21 22:06:38,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:06:38,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699576630] [2023-11-21 22:06:38,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:06:38,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:38,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:06:38,733 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:06:38,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-21 22:06:38,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-21 22:06:38,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:06:38,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:06:38,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:38,869 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 7 [2023-11-21 22:06:38,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:38,882 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 8 treesize of output 1 [2023-11-21 22:06:38,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:38,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 22:06:38,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:38,909 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 8 treesize of output 1 [2023-11-21 22:06:38,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:38,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 22:06:38,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:38,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 22:06:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-21 22:06:39,160 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:06:39,160 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:06:39,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699576630] [2023-11-21 22:06:39,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699576630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:39,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:39,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:06:39,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402963466] [2023-11-21 22:06:39,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:39,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:06:39,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:06:39,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:06:39,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:06:39,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 53 [2023-11-21 22:06:39,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 64 transitions, 395 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:39,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:39,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 53 [2023-11-21 22:06:39,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:39,485 INFO L124 PetriNetUnfolderBase]: 329/721 cut-off events. [2023-11-21 22:06:39,485 INFO L125 PetriNetUnfolderBase]: For 348/354 co-relation queries the response was YES. [2023-11-21 22:06:39,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1552 conditions, 721 events. 329/721 cut-off events. For 348/354 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3576 event pairs, 249 based on Foata normal form. 35/711 useless extension candidates. Maximal degree in co-relation 1526. Up to 532 conditions per place. [2023-11-21 22:06:39,493 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 39 selfloop transitions, 11 changer transitions 0/61 dead transitions. [2023-11-21 22:06:39,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 61 transitions, 471 flow [2023-11-21 22:06:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:06:39,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:06:39,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2023-11-21 22:06:39,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5471698113207547 [2023-11-21 22:06:39,495 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 116 transitions. [2023-11-21 22:06:39,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 116 transitions. [2023-11-21 22:06:39,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:39,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 116 transitions. [2023-11-21 22:06:39,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:39,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:39,497 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:39,497 INFO L175 Difference]: Start difference. First operand has 87 places, 64 transitions, 395 flow. Second operand 4 states and 116 transitions. [2023-11-21 22:06:39,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 61 transitions, 471 flow [2023-11-21 22:06:39,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 61 transitions, 390 flow, removed 27 selfloop flow, removed 11 redundant places. [2023-11-21 22:06:39,503 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 312 flow [2023-11-21 22:06:39,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2023-11-21 22:06:39,504 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 23 predicate places. [2023-11-21 22:06:39,504 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 312 flow [2023-11-21 22:06:39,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:39,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:39,504 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2023-11-21 22:06:39,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-11-21 22:06:39,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:39,707 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 22:06:39,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:39,707 INFO L85 PathProgramCache]: Analyzing trace with hash -2024056471, now seen corresponding path program 3 times [2023-11-21 22:06:39,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:06:39,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045419035] [2023-11-21 22:06:39,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:06:39,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:06:39,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:06:39,710 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 22:06:39,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433636e4-268b-4a76-b7f5-4c673d209350/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-21 22:06:40,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-21 22:06:40,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:06:40,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-21 22:06:40,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:40,067 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 7 [2023-11-21 22:06:40,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:40,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 22:06:40,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:40,114 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 8 treesize of output 1 [2023-11-21 22:06:40,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:40,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 22:06:40,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:40,139 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 8 treesize of output 1 [2023-11-21 22:06:40,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:40,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 22:06:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:40,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:06:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:44,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:06:44,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045419035] [2023-11-21 22:06:44,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045419035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:06:44,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:06:44,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-11-21 22:06:44,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870654833] [2023-11-21 22:06:44,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:06:44,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-21 22:06:44,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:06:44,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-21 22:06:44,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2023-11-21 22:06:51,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2023-11-21 22:06:51,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 312 flow. Second operand has 26 states, 26 states have (on average 23.76923076923077) internal successors, (618), 26 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:51,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:51,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2023-11-21 22:06:51,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand