./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI --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 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:41:42,616 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:41:42,733 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:41:42,743 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:41:42,745 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:41:42,813 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:41:42,815 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:41:42,816 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:41:42,817 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:41:42,822 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:41:42,822 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:41:42,823 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:41:42,824 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:41:42,824 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:41:42,825 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:41:42,825 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:41:42,826 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:41:42,826 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:41:42,829 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:41:42,829 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:41:42,830 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:41:42,830 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:41:42,831 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:41:42,831 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:41:42,832 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:41:42,832 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:41:42,833 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:41:42,833 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:41:42,834 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:41:42,835 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:41:42,836 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:41:42,837 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:41:42,837 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:41:42,837 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:41:42,838 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:41:42,854 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:41:42,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:41:42,854 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:41:42,855 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:41:42,855 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:41:42,855 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:41:42,856 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_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 [2023-11-24 21:41:43,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:41:43,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:41:43,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:41:43,257 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:41:43,258 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:41:43,259 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-24 21:41:46,409 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:41:46,725 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:41:46,727 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-24 21:41:46,739 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/data/08b3eb183/2c5a756b27aa42c5be7ed38fa90a557b/FLAGef9399848 [2023-11-24 21:41:46,777 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/data/08b3eb183/2c5a756b27aa42c5be7ed38fa90a557b [2023-11-24 21:41:46,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:41:46,784 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:41:46,788 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:41:46,789 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:41:46,794 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:41:46,797 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:41:46" (1/1) ... [2023-11-24 21:41:46,798 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ded0c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:46, skipping insertion in model container [2023-11-24 21:41:46,799 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:41:46" (1/1) ... [2023-11-24 21:41:46,828 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:41:47,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:41:47,084 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) [2023-11-24 21:41:47,085 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@26e44bdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:47, skipping insertion in model container [2023-11-24 21:41:47,085 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:41:47,085 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-24 21:41:47,088 INFO L158 Benchmark]: Toolchain (without parser) took 302.53ms. Allocated memory is still 184.5MB. Free memory was 155.4MB in the beginning and 145.7MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-24 21:41:47,088 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 125.8MB. Free memory is still 98.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:41:47,089 INFO L158 Benchmark]: CACSL2BoogieTranslator took 297.19ms. Allocated memory is still 184.5MB. Free memory was 155.4MB in the beginning and 145.7MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-24 21:41:47,091 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 125.8MB. Free memory is still 98.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 297.19ms. Allocated memory is still 184.5MB. Free memory was 155.4MB in the beginning and 145.7MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI --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 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:41:49,698 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:41:49,846 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-24 21:41:49,854 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:41:49,855 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:41:49,901 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:41:49,902 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:41:49,903 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:41:49,904 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:41:49,909 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:41:49,909 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:41:49,910 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:41:49,911 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:41:49,912 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:41:49,913 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:41:49,914 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:41:49,914 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:41:49,914 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:41:49,915 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:41:49,915 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:41:49,916 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:41:49,917 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:41:49,917 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:41:49,917 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:41:49,918 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:41:49,918 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 21:41:49,919 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 21:41:49,919 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:41:49,920 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:41:49,920 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:41:49,922 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:41:49,922 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:41:49,923 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:41:49,923 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:41:49,923 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:41:49,924 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:41:49,925 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:41:49,925 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-24 21:41:49,925 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 21:41:49,925 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:41:49,926 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:41:49,926 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:41:49,926 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:41:49,927 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-24 21:41:49,927 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_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 [2023-11-24 21:41:50,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:41:50,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:41:50,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:41:50,349 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:41:50,349 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:41:50,351 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-24 21:41:53,504 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:41:53,832 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:41:53,833 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-24 21:41:53,844 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/data/d2a13c77a/3f13ed5628cc49a69e6f4db757c53068/FLAG8eb5e5e8a [2023-11-24 21:41:53,863 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/data/d2a13c77a/3f13ed5628cc49a69e6f4db757c53068 [2023-11-24 21:41:53,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:41:53,871 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:41:53,874 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:41:53,875 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:41:53,880 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:41:53,881 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:41:53" (1/1) ... [2023-11-24 21:41:53,882 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dd5b19b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:53, skipping insertion in model container [2023-11-24 21:41:53,882 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:41:53" (1/1) ... [2023-11-24 21:41:53,916 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:41:54,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:41:54,175 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-24 21:41:54,180 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:41:54,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:41:54,205 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:41:54,234 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:41:54,245 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:41:54,245 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:41:54,254 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:41:54,254 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:54 WrapperNode [2023-11-24 21:41:54,255 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:41:54,256 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:41:54,256 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:41:54,256 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:41:54,265 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:54" (1/1) ... [2023-11-24 21:41:54,277 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:54" (1/1) ... [2023-11-24 21:41:54,320 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 156 [2023-11-24 21:41:54,320 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:41:54,321 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:41:54,321 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:41:54,321 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:41:54,334 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:54" (1/1) ... [2023-11-24 21:41:54,335 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:54" (1/1) ... [2023-11-24 21:41:54,339 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:54" (1/1) ... [2023-11-24 21:41:54,358 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 4, 2]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-24 21:41:54,358 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:54" (1/1) ... [2023-11-24 21:41:54,359 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:54" (1/1) ... [2023-11-24 21:41:54,382 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:54" (1/1) ... [2023-11-24 21:41:54,387 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:54" (1/1) ... [2023-11-24 21:41:54,389 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:54" (1/1) ... [2023-11-24 21:41:54,392 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:54" (1/1) ... [2023-11-24 21:41:54,396 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:41:54,411 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:41:54,412 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:41:54,412 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:41:54,413 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:54" (1/1) ... [2023-11-24 21:41:54,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:41:54,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:41:54,451 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:41:54,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:41:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:41:54,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-24 21:41:54,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-24 21:41:54,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-24 21:41:54,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-24 21:41:54,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:41:54,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-24 21:41:54,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-24 21:41:54,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-24 21:41:54,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-24 21:41:54,497 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:41:54,497 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:41:54,497 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:41:54,497 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:41:54,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:41:54,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:41:54,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:41:54,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:41:54,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:41:54,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:41:54,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-24 21:41:54,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-24 21:41:54,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-24 21:41:54,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-24 21:41:54,502 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:41:54,654 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:41:54,656 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:41:55,129 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:41:55,445 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:41:55,450 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-24 21:41:55,450 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:41:55 BoogieIcfgContainer [2023-11-24 21:41:55,451 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:41:55,454 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:41:55,454 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:41:55,458 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:41:55,458 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:41:53" (1/3) ... [2023-11-24 21:41:55,459 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@391a7f5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:41:55, skipping insertion in model container [2023-11-24 21:41:55,459 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:54" (2/3) ... [2023-11-24 21:41:55,462 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@391a7f5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:41:55, skipping insertion in model container [2023-11-24 21:41:55,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:41:55" (3/3) ... [2023-11-24 21:41:55,465 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-11-24 21:41:55,488 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:41:55,488 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-24 21:41:55,488 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:41:55,572 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:41:55,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 58 transitions, 130 flow [2023-11-24 21:41:55,674 INFO L124 PetriNetUnfolderBase]: 5/56 cut-off events. [2023-11-24 21:41:55,675 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:41:55,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 56 events. 5/56 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 119 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2023-11-24 21:41:55,680 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 58 transitions, 130 flow [2023-11-24 21:41:55,687 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 122 flow [2023-11-24 21:41:55,706 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:41:55,718 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;@38ded145, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:41:55,718 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-24 21:41:55,724 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:41:55,724 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-24 21:41:55,725 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:41:55,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:55,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:41:55,726 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:41:55,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:55,733 INFO L85 PathProgramCache]: Analyzing trace with hash 451072, now seen corresponding path program 1 times [2023-11-24 21:41:55,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:41:55,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993653908] [2023-11-24 21:41:55,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:55,750 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 [2023-11-24 21:41:55,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:41:55,754 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:41:55,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:41:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:55,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:41:55,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:55,986 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 16 treesize of output 7 [2023-11-24 21:41:56,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:56,012 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 [2023-11-24 21:41:56,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:56,026 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 [2023-11-24 21:41:56,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:56,034 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 [2023-11-24 21:41:56,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:56,046 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 [2023-11-24 21:41:56,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:56,061 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 [2023-11-24 21:41:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:56,072 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:41:56,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:41:56,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993653908] [2023-11-24 21:41:56,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993653908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:56,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:56,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:41:56,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310526789] [2023-11-24 21:41:56,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:56,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:56,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:41:56,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:56,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:56,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 58 [2023-11-24 21:41:56,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:56,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:56,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 58 [2023-11-24 21:41:56,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:56,443 INFO L124 PetriNetUnfolderBase]: 215/410 cut-off events. [2023-11-24 21:41:56,443 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-24 21:41:56,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 773 conditions, 410 events. 215/410 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1909 event pairs, 141 based on Foata normal form. 10/289 useless extension candidates. Maximal degree in co-relation 674. Up to 333 conditions per place. [2023-11-24 21:41:56,458 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 25 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-11-24 21:41:56,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 51 transitions, 168 flow [2023-11-24 21:41:56,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:56,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:41:56,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2023-11-24 21:41:56,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6379310344827587 [2023-11-24 21:41:56,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2023-11-24 21:41:56,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2023-11-24 21:41:56,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:56,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2023-11-24 21:41:56,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:56,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:56,498 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:56,501 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 122 flow. Second operand 3 states and 111 transitions. [2023-11-24 21:41:56,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 51 transitions, 168 flow [2023-11-24 21:41:56,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 160 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:41:56,514 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 110 flow [2023-11-24 21:41:56,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-11-24 21:41:56,523 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2023-11-24 21:41:56,524 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 110 flow [2023-11-24 21:41:56,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:56,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:56,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:41:56,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:41:56,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:41:56,729 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:41:56,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:56,729 INFO L85 PathProgramCache]: Analyzing trace with hash 451073, now seen corresponding path program 1 times [2023-11-24 21:41:56,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:41:56,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134362609] [2023-11-24 21:41:56,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:56,730 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 [2023-11-24 21:41:56,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:41:56,736 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:41:56,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:41:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:56,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:41:56,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:56,832 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 [2023-11-24 21:41:56,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:56,861 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 [2023-11-24 21:41:56,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:56,876 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 [2023-11-24 21:41:56,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:56,885 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 [2023-11-24 21:41:56,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:56,896 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 [2023-11-24 21:41:56,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:56,909 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 [2023-11-24 21:41:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:57,000 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:41:57,001 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:41:57,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134362609] [2023-11-24 21:41:57,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134362609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:57,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:57,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:41:57,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481732516] [2023-11-24 21:41:57,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:57,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:41:57,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:41:57,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:41:57,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:41:57,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 58 [2023-11-24 21:41:57,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:57,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:57,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 58 [2023-11-24 21:41:57,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:57,587 INFO L124 PetriNetUnfolderBase]: 216/413 cut-off events. [2023-11-24 21:41:57,588 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-24 21:41:57,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 413 events. 216/413 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1922 event pairs, 141 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 741. Up to 338 conditions per place. [2023-11-24 21:41:57,595 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 27 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-11-24 21:41:57,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 180 flow [2023-11-24 21:41:57,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:41:57,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:41:57,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 140 transitions. [2023-11-24 21:41:57,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2023-11-24 21:41:57,598 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 140 transitions. [2023-11-24 21:41:57,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 140 transitions. [2023-11-24 21:41:57,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:57,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 140 transitions. [2023-11-24 21:41:57,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:57,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:57,603 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:57,604 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 110 flow. Second operand 4 states and 140 transitions. [2023-11-24 21:41:57,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 180 flow [2023-11-24 21:41:57,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 54 transitions, 174 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:41:57,607 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 133 flow [2023-11-24 21:41:57,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-11-24 21:41:57,609 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-11-24 21:41:57,609 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 133 flow [2023-11-24 21:41:57,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:57,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:57,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:41:57,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:41:57,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:41:57,813 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:41:57,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:57,813 INFO L85 PathProgramCache]: Analyzing trace with hash 451113, now seen corresponding path program 1 times [2023-11-24 21:41:57,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:41:57,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584853211] [2023-11-24 21:41:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:57,815 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 [2023-11-24 21:41:57,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:41:57,817 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:41:57,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:41:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:57,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:41:57,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:57,921 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:41:57,922 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 [2023-11-24 21:41:57,957 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-24 21:41:57,958 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 [2023-11-24 21:41:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:58,021 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:41:58,021 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:41:58,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584853211] [2023-11-24 21:41:58,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584853211] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:58,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:58,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:41:58,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115506247] [2023-11-24 21:41:58,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:58,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:58,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:41:58,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:58,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:58,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 58 [2023-11-24 21:41:58,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:58,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:58,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 58 [2023-11-24 21:41:58,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:58,361 INFO L124 PetriNetUnfolderBase]: 337/628 cut-off events. [2023-11-24 21:41:58,361 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-24 21:41:58,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1157 conditions, 628 events. 337/628 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3105 event pairs, 228 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 1133. Up to 508 conditions per place. [2023-11-24 21:41:58,369 INFO L140 encePairwiseOnDemand]: 55/58 looper letters, 31 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-11-24 21:41:58,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 193 flow [2023-11-24 21:41:58,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:58,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:41:58,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2023-11-24 21:41:58,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5919540229885057 [2023-11-24 21:41:58,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 103 transitions. [2023-11-24 21:41:58,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 103 transitions. [2023-11-24 21:41:58,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:58,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 103 transitions. [2023-11-24 21:41:58,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:58,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:58,380 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:58,380 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 133 flow. Second operand 3 states and 103 transitions. [2023-11-24 21:41:58,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 193 flow [2023-11-24 21:41:58,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 52 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:41:58,384 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 128 flow [2023-11-24 21:41:58,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=52, 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=128, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2023-11-24 21:41:58,386 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2023-11-24 21:41:58,386 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 128 flow [2023-11-24 21:41:58,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:58,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:58,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:41:58,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:41:58,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:41:58,589 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:41:58,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:58,590 INFO L85 PathProgramCache]: Analyzing trace with hash 451114, now seen corresponding path program 1 times [2023-11-24 21:41:58,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:41:58,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556980831] [2023-11-24 21:41:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:58,591 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 [2023-11-24 21:41:58,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:41:58,592 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:41:58,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:41:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:58,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:41:58,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:58,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:58,739 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 [2023-11-24 21:41:58,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:58,755 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 5 treesize of output 3 [2023-11-24 21:41:58,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:58,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:58,801 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 [2023-11-24 21:41:58,817 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 [2023-11-24 21:41:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:58,958 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:41:58,959 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:41:58,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556980831] [2023-11-24 21:41:58,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556980831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:58,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:58,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:41:58,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369793473] [2023-11-24 21:41:58,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:58,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:58,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:41:58,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:58,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:59,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 58 [2023-11-24 21:41:59,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:59,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:59,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 58 [2023-11-24 21:41:59,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:59,326 INFO L124 PetriNetUnfolderBase]: 216/405 cut-off events. [2023-11-24 21:41:59,327 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-24 21:41:59,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 405 events. 216/405 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 1873 event pairs, 141 based on Foata normal form. 53/335 useless extension candidates. Maximal degree in co-relation 754. Up to 338 conditions per place. [2023-11-24 21:41:59,331 INFO L140 encePairwiseOnDemand]: 55/58 looper letters, 29 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-11-24 21:41:59,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 184 flow [2023-11-24 21:41:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:59,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:41:59,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2023-11-24 21:41:59,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149425287356322 [2023-11-24 21:41:59,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2023-11-24 21:41:59,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2023-11-24 21:41:59,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:59,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2023-11-24 21:41:59,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:59,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:59,335 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:59,336 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 128 flow. Second operand 3 states and 107 transitions. [2023-11-24 21:41:59,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 184 flow [2023-11-24 21:41:59,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:41:59,338 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 125 flow [2023-11-24 21:41:59,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=51, 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=125, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-11-24 21:41:59,339 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2023-11-24 21:41:59,339 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 125 flow [2023-11-24 21:41:59,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:59,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:59,340 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-24 21:41:59,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:41:59,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:41:59,548 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:41:59,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:59,549 INFO L85 PathProgramCache]: Analyzing trace with hash 433495932, now seen corresponding path program 1 times [2023-11-24 21:41:59,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:41:59,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562701746] [2023-11-24 21:41:59,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:59,549 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 [2023-11-24 21:41:59,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:41:59,551 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:41:59,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:41:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:59,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:41:59,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:59,664 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 [2023-11-24 21:41:59,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:59,687 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 [2023-11-24 21:41:59,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:59,702 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 [2023-11-24 21:41:59,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:59,720 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 [2023-11-24 21:41:59,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:59,730 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 [2023-11-24 21:41:59,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:59,745 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 [2023-11-24 21:41:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:59,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:42:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:00,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:42:00,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562701746] [2023-11-24 21:42:00,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562701746] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:42:00,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:42:00,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:42:00,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506356675] [2023-11-24 21:42:00,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:42:00,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:42:00,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:42:00,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:42:00,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:42:01,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 58 [2023-11-24 21:42:01,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 125 flow. Second operand has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:01,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:01,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 58 [2023-11-24 21:42:01,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:02,323 INFO L124 PetriNetUnfolderBase]: 219/414 cut-off events. [2023-11-24 21:42:02,323 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-24 21:42:02,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 792 conditions, 414 events. 219/414 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 1918 event pairs, 141 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 782. Up to 341 conditions per place. [2023-11-24 21:42:02,327 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 27 selfloop transitions, 13 changer transitions 0/59 dead transitions. [2023-11-24 21:42:02,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 59 transitions, 241 flow [2023-11-24 21:42:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:42:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:42:02,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 313 transitions. [2023-11-24 21:42:02,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396551724137931 [2023-11-24 21:42:02,331 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 313 transitions. [2023-11-24 21:42:02,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 313 transitions. [2023-11-24 21:42:02,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:02,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 313 transitions. [2023-11-24 21:42:02,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 31.3) internal successors, (313), 10 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:02,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:02,337 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:02,337 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 125 flow. Second operand 10 states and 313 transitions. [2023-11-24 21:42:02,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 59 transitions, 241 flow [2023-11-24 21:42:02,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 59 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:42:02,341 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 204 flow [2023-11-24 21:42:02,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=204, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-11-24 21:42:02,345 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2023-11-24 21:42:02,345 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 204 flow [2023-11-24 21:42:02,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:02,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:02,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:42:02,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:42:02,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:42:02,549 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:42:02,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:02,549 INFO L85 PathProgramCache]: Analyzing trace with hash 554655022, now seen corresponding path program 1 times [2023-11-24 21:42:02,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:42:02,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009806178] [2023-11-24 21:42:02,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:02,550 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 [2023-11-24 21:42:02,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:42:02,551 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:42:02,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:42:02,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:02,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:42:02,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:42:02,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:02,659 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 [2023-11-24 21:42:02,669 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 16 treesize of output 5 [2023-11-24 21:42:02,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:02,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:02,688 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 [2023-11-24 21:42:02,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:02,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:02,702 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 [2023-11-24 21:42:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:02,741 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:42:02,741 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:42:02,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009806178] [2023-11-24 21:42:02,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009806178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:42:02,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:42:02,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:42:02,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008734962] [2023-11-24 21:42:02,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:02,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:42:02,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:42:02,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:42:02,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:42:02,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 58 [2023-11-24 21:42:02,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:02,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:02,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 58 [2023-11-24 21:42:02,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:02,998 INFO L124 PetriNetUnfolderBase]: 219/410 cut-off events. [2023-11-24 21:42:02,999 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-24 21:42:03,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 410 events. 219/410 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1869 event pairs, 141 based on Foata normal form. 16/307 useless extension candidates. Maximal degree in co-relation 798. Up to 347 conditions per place. [2023-11-24 21:42:03,003 INFO L140 encePairwiseOnDemand]: 55/58 looper letters, 38 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-11-24 21:42:03,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 278 flow [2023-11-24 21:42:03,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:42:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:42:03,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2023-11-24 21:42:03,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149425287356322 [2023-11-24 21:42:03,005 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2023-11-24 21:42:03,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2023-11-24 21:42:03,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:03,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2023-11-24 21:42:03,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:03,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:03,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:03,008 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 204 flow. Second operand 3 states and 107 transitions. [2023-11-24 21:42:03,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 278 flow [2023-11-24 21:42:03,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 57 transitions, 248 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-24 21:42:03,015 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 172 flow [2023-11-24 21:42:03,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2023-11-24 21:42:03,020 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2023-11-24 21:42:03,020 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 172 flow [2023-11-24 21:42:03,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:03,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:03,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:42:03,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:42:03,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:42:03,223 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:42:03,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:03,224 INFO L85 PathProgramCache]: Analyzing trace with hash 554655021, now seen corresponding path program 1 times [2023-11-24 21:42:03,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:42:03,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685531753] [2023-11-24 21:42:03,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:03,224 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:42:03,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:42:03,225 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:42:03,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:42:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:03,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:42:03,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:42:03,352 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:42:03,352 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 [2023-11-24 21:42:03,380 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:42:03,381 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 [2023-11-24 21:42:03,404 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:42:03,405 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 [2023-11-24 21:42:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:03,523 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:42:03,523 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:42:03,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685531753] [2023-11-24 21:42:03,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685531753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:42:03,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:42:03,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:42:03,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187280801] [2023-11-24 21:42:03,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:03,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:42:03,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:42:03,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:42:03,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:42:03,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 58 [2023-11-24 21:42:03,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:03,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:03,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 58 [2023-11-24 21:42:03,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:03,787 INFO L124 PetriNetUnfolderBase]: 238/442 cut-off events. [2023-11-24 21:42:03,787 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-24 21:42:03,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 442 events. 238/442 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2020 event pairs, 156 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 851. Up to 382 conditions per place. [2023-11-24 21:42:03,792 INFO L140 encePairwiseOnDemand]: 55/58 looper letters, 40 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-11-24 21:42:03,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 250 flow [2023-11-24 21:42:03,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:42:03,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:42:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2023-11-24 21:42:03,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5919540229885057 [2023-11-24 21:42:03,816 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 103 transitions. [2023-11-24 21:42:03,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 103 transitions. [2023-11-24 21:42:03,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:03,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 103 transitions. [2023-11-24 21:42:03,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:03,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:03,818 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:03,818 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 172 flow. Second operand 3 states and 103 transitions. [2023-11-24 21:42:03,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 250 flow [2023-11-24 21:42:03,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 249 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:42:03,822 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 169 flow [2023-11-24 21:42:03,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2023-11-24 21:42:03,822 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2023-11-24 21:42:03,825 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 169 flow [2023-11-24 21:42:03,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:03,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:03,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:42:03,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:42:04,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:42:04,026 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:42:04,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:04,027 INFO L85 PathProgramCache]: Analyzing trace with hash 447898751, now seen corresponding path program 1 times [2023-11-24 21:42:04,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:42:04,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546226114] [2023-11-24 21:42:04,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:04,028 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 [2023-11-24 21:42:04,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:42:04,029 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:42:04,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:42:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:04,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:42:04,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:42:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:04,172 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:42:04,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:42:04,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546226114] [2023-11-24 21:42:04,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546226114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:42:04,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:42:04,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:42:04,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267317644] [2023-11-24 21:42:04,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:04,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:42:04,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:42:04,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:42:04,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:42:04,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 58 [2023-11-24 21:42:04,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:04,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:04,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 58 [2023-11-24 21:42:04,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:04,584 INFO L124 PetriNetUnfolderBase]: 335/672 cut-off events. [2023-11-24 21:42:04,584 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-24 21:42:04,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1296 conditions, 672 events. 335/672 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3271 event pairs, 71 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 1281. Up to 233 conditions per place. [2023-11-24 21:42:04,590 INFO L140 encePairwiseOnDemand]: 52/58 looper letters, 82 selfloop transitions, 7 changer transitions 0/103 dead transitions. [2023-11-24 21:42:04,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 103 transitions, 446 flow [2023-11-24 21:42:04,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:42:04,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:42:04,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 209 transitions. [2023-11-24 21:42:04,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7206896551724138 [2023-11-24 21:42:04,593 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 209 transitions. [2023-11-24 21:42:04,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 209 transitions. [2023-11-24 21:42:04,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:04,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 209 transitions. [2023-11-24 21:42:04,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:04,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 58.0) internal successors, (348), 6 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:04,595 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 58.0) internal successors, (348), 6 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:04,596 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 169 flow. Second operand 5 states and 209 transitions. [2023-11-24 21:42:04,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 103 transitions, 446 flow [2023-11-24 21:42:04,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 103 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:42:04,604 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 224 flow [2023-11-24 21:42:04,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-11-24 21:42:04,607 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2023-11-24 21:42:04,607 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 224 flow [2023-11-24 21:42:04,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:04,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:04,608 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-24 21:42:04,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:42:04,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:42:04,810 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:42:04,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:04,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1375213715, now seen corresponding path program 2 times [2023-11-24 21:42:04,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:42:04,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097883691] [2023-11-24 21:42:04,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:42:04,811 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 [2023-11-24 21:42:04,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:42:04,812 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:42:04,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:42:04,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:42:04,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:42:04,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 21:42:04,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:42:04,937 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 [2023-11-24 21:42:04,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:04,954 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 [2023-11-24 21:42:04,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:04,969 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 [2023-11-24 21:42:04,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:04,978 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 [2023-11-24 21:42:05,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:05,003 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 [2023-11-24 21:42:05,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:05,016 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 [2023-11-24 21:42:05,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:05,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:42:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:06,316 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:42:06,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097883691] [2023-11-24 21:42:06,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097883691] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:42:06,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:42:06,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-24 21:42:06,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936992086] [2023-11-24 21:42:06,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:42:06,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:42:06,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:42:06,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:42:06,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:42:08,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 58 [2023-11-24 21:42:08,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 224 flow. Second operand has 14 states, 14 states have (on average 28.571428571428573) internal successors, (400), 14 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:08,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:08,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 58 [2023-11-24 21:42:08,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:12,648 INFO L124 PetriNetUnfolderBase]: 294/627 cut-off events. [2023-11-24 21:42:12,648 INFO L125 PetriNetUnfolderBase]: For 438/466 co-relation queries the response was YES. [2023-11-24 21:42:12,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1501 conditions, 627 events. 294/627 cut-off events. For 438/466 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3275 event pairs, 186 based on Foata normal form. 34/534 useless extension candidates. Maximal degree in co-relation 1481. Up to 486 conditions per place. [2023-11-24 21:42:12,655 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 32 selfloop transitions, 31 changer transitions 0/79 dead transitions. [2023-11-24 21:42:12,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 79 transitions, 434 flow [2023-11-24 21:42:12,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-24 21:42:12,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-24 21:42:12,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 658 transitions. [2023-11-24 21:42:12,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156739811912225 [2023-11-24 21:42:12,675 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 658 transitions. [2023-11-24 21:42:12,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 658 transitions. [2023-11-24 21:42:12,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:12,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 658 transitions. [2023-11-24 21:42:12,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 29.90909090909091) internal successors, (658), 22 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:12,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 58.0) internal successors, (1334), 23 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:12,683 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 58.0) internal successors, (1334), 23 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:12,683 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 224 flow. Second operand 22 states and 658 transitions. [2023-11-24 21:42:12,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 79 transitions, 434 flow [2023-11-24 21:42:12,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 79 transitions, 434 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:42:12,688 INFO L231 Difference]: Finished difference. Result has 94 places, 79 transitions, 400 flow [2023-11-24 21:42:12,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=400, PETRI_PLACES=94, PETRI_TRANSITIONS=79} [2023-11-24 21:42:12,689 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2023-11-24 21:42:12,689 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 79 transitions, 400 flow [2023-11-24 21:42:12,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.571428571428573) internal successors, (400), 14 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:12,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:12,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:42:12,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:42:12,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:42:12,893 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:42:12,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:12,893 INFO L85 PathProgramCache]: Analyzing trace with hash -771289123, now seen corresponding path program 1 times [2023-11-24 21:42:12,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:42:12,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94809340] [2023-11-24 21:42:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:12,894 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 [2023-11-24 21:42:12,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:42:12,894 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:42:12,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:42:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:12,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:42:12,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:42:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:12,994 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:42:12,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:42:12,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94809340] [2023-11-24 21:42:12,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94809340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:42:12,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:42:12,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:42:12,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904104233] [2023-11-24 21:42:12,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:12,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:42:12,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:42:12,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:42:12,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:42:13,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 58 [2023-11-24 21:42:13,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 79 transitions, 400 flow. Second operand has 3 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) [2023-11-24 21:42:13,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:13,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 58 [2023-11-24 21:42:13,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:13,254 INFO L124 PetriNetUnfolderBase]: 324/632 cut-off events. [2023-11-24 21:42:13,254 INFO L125 PetriNetUnfolderBase]: For 484/504 co-relation queries the response was YES. [2023-11-24 21:42:13,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1632 conditions, 632 events. 324/632 cut-off events. For 484/504 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3091 event pairs, 157 based on Foata normal form. 25/571 useless extension candidates. Maximal degree in co-relation 1604. Up to 448 conditions per place. [2023-11-24 21:42:13,265 INFO L140 encePairwiseOnDemand]: 55/58 looper letters, 76 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-11-24 21:42:13,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 93 transitions, 588 flow [2023-11-24 21:42:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:42:13,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:42:13,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2023-11-24 21:42:13,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7126436781609196 [2023-11-24 21:42:13,267 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 124 transitions. [2023-11-24 21:42:13,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 124 transitions. [2023-11-24 21:42:13,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:13,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 124 transitions. [2023-11-24 21:42:13,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:13,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:13,269 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:13,270 INFO L175 Difference]: Start difference. First operand has 94 places, 79 transitions, 400 flow. Second operand 3 states and 124 transitions. [2023-11-24 21:42:13,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 93 transitions, 588 flow [2023-11-24 21:42:13,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 93 transitions, 508 flow, removed 27 selfloop flow, removed 9 redundant places. [2023-11-24 21:42:13,276 INFO L231 Difference]: Finished difference. Result has 88 places, 78 transitions, 320 flow [2023-11-24 21:42:13,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=88, PETRI_TRANSITIONS=78} [2023-11-24 21:42:13,277 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 31 predicate places. [2023-11-24 21:42:13,277 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 78 transitions, 320 flow [2023-11-24 21:42:13,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-24 21:42:13,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:13,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:42:13,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:42:13,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:42:13,480 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:42:13,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:13,481 INFO L85 PathProgramCache]: Analyzing trace with hash -771289157, now seen corresponding path program 1 times [2023-11-24 21:42:13,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:42:13,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777695728] [2023-11-24 21:42:13,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:13,482 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 [2023-11-24 21:42:13,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:42:13,483 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:42:13,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:42:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:13,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:42:13,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:42:13,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:42:13,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:13,599 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 [2023-11-24 21:42:13,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:13,610 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 [2023-11-24 21:42:13,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:13,626 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 [2023-11-24 21:42:13,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:13,633 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 [2023-11-24 21:42:13,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:13,642 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 [2023-11-24 21:42:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:13,682 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:42:13,683 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:42:13,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777695728] [2023-11-24 21:42:13,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777695728] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:42:13,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:42:13,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:42:13,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363804101] [2023-11-24 21:42:13,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:13,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:42:13,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:42:13,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:42:13,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:42:13,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 58 [2023-11-24 21:42:13,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 78 transitions, 320 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:13,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:13,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 58 [2023-11-24 21:42:13,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:14,060 INFO L124 PetriNetUnfolderBase]: 243/514 cut-off events. [2023-11-24 21:42:14,060 INFO L125 PetriNetUnfolderBase]: For 386/404 co-relation queries the response was YES. [2023-11-24 21:42:14,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1297 conditions, 514 events. 243/514 cut-off events. For 386/404 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2483 event pairs, 156 based on Foata normal form. 18/482 useless extension candidates. Maximal degree in co-relation 1269. Up to 390 conditions per place. [2023-11-24 21:42:14,067 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 46 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2023-11-24 21:42:14,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 75 transitions, 430 flow [2023-11-24 21:42:14,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:42:14,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:42:14,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2023-11-24 21:42:14,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5689655172413793 [2023-11-24 21:42:14,069 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 132 transitions. [2023-11-24 21:42:14,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 132 transitions. [2023-11-24 21:42:14,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:14,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 132 transitions. [2023-11-24 21:42:14,071 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) [2023-11-24 21:42:14,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:14,072 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:14,072 INFO L175 Difference]: Start difference. First operand has 88 places, 78 transitions, 320 flow. Second operand 4 states and 132 transitions. [2023-11-24 21:42:14,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 75 transitions, 430 flow [2023-11-24 21:42:14,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 75 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:42:14,078 INFO L231 Difference]: Finished difference. Result has 87 places, 75 transitions, 336 flow [2023-11-24 21:42:14,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=87, PETRI_TRANSITIONS=75} [2023-11-24 21:42:14,079 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2023-11-24 21:42:14,079 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 75 transitions, 336 flow [2023-11-24 21:42:14,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:14,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:14,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:42:14,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:42:14,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:42:14,282 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:42:14,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:14,282 INFO L85 PathProgramCache]: Analyzing trace with hash -771289156, now seen corresponding path program 1 times [2023-11-24 21:42:14,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:42:14,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043857757] [2023-11-24 21:42:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:14,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:42:14,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:42:14,284 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:42:14,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:42:14,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:14,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:42:14,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:42:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:14,471 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:42:14,472 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:42:14,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043857757] [2023-11-24 21:42:14,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043857757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:42:14,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:42:14,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:42:14,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862620538] [2023-11-24 21:42:14,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:14,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:42:14,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:42:14,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:42:14,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:42:14,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2023-11-24 21:42:14,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 75 transitions, 336 flow. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:14,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:14,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2023-11-24 21:42:14,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:14,775 INFO L124 PetriNetUnfolderBase]: 265/583 cut-off events. [2023-11-24 21:42:14,775 INFO L125 PetriNetUnfolderBase]: For 409/437 co-relation queries the response was YES. [2023-11-24 21:42:14,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1447 conditions, 583 events. 265/583 cut-off events. For 409/437 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2942 event pairs, 179 based on Foata normal form. 33/561 useless extension candidates. Maximal degree in co-relation 1418. Up to 411 conditions per place. [2023-11-24 21:42:14,782 INFO L140 encePairwiseOnDemand]: 54/58 looper letters, 66 selfloop transitions, 3 changer transitions 1/87 dead transitions. [2023-11-24 21:42:14,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 87 transitions, 508 flow [2023-11-24 21:42:14,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:42:14,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:42:14,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2023-11-24 21:42:14,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6594827586206896 [2023-11-24 21:42:14,784 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 153 transitions. [2023-11-24 21:42:14,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 153 transitions. [2023-11-24 21:42:14,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:14,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 153 transitions. [2023-11-24 21:42:14,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:14,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:14,786 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:14,787 INFO L175 Difference]: Start difference. First operand has 87 places, 75 transitions, 336 flow. Second operand 4 states and 153 transitions. [2023-11-24 21:42:14,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 87 transitions, 508 flow [2023-11-24 21:42:14,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 495 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:42:14,792 INFO L231 Difference]: Finished difference. Result has 89 places, 75 transitions, 332 flow [2023-11-24 21:42:14,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=332, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2023-11-24 21:42:14,793 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 32 predicate places. [2023-11-24 21:42:14,793 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 332 flow [2023-11-24 21:42:14,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:14,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:14,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:42:14,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-24 21:42:14,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:42:14,997 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:42:14,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:14,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1762627721, now seen corresponding path program 1 times [2023-11-24 21:42:14,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:42:14,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694173710] [2023-11-24 21:42:14,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:14,998 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 [2023-11-24 21:42:14,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:42:14,999 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:42:15,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:42:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:15,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-24 21:42:15,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:42:15,147 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 [2023-11-24 21:42:15,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:15,165 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 [2023-11-24 21:42:15,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:15,184 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 [2023-11-24 21:42:15,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:15,197 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 [2023-11-24 21:42:15,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:15,223 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 [2023-11-24 21:42:15,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:15,236 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 [2023-11-24 21:42:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:15,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:42:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:17,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:42:17,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694173710] [2023-11-24 21:42:17,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694173710] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:42:17,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:42:17,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-24 21:42:17,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531286100] [2023-11-24 21:42:17,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:42:17,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 21:42:17,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:42:17,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 21:42:17,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:42:20,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 58 [2023-11-24 21:42:20,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 332 flow. Second operand has 12 states, 12 states have (on average 28.833333333333332) internal successors, (346), 12 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:20,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:20,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 58 [2023-11-24 21:42:20,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:23,398 INFO L124 PetriNetUnfolderBase]: 645/1373 cut-off events. [2023-11-24 21:42:23,398 INFO L125 PetriNetUnfolderBase]: For 945/1005 co-relation queries the response was YES. [2023-11-24 21:42:23,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3409 conditions, 1373 events. 645/1373 cut-off events. For 945/1005 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8389 event pairs, 312 based on Foata normal form. 60/1335 useless extension candidates. Maximal degree in co-relation 3379. Up to 327 conditions per place. [2023-11-24 21:42:23,414 INFO L140 encePairwiseOnDemand]: 47/58 looper letters, 92 selfloop transitions, 40 changer transitions 1/149 dead transitions. [2023-11-24 21:42:23,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 149 transitions, 855 flow [2023-11-24 21:42:23,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:42:23,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-24 21:42:23,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 457 transitions. [2023-11-24 21:42:23,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6061007957559682 [2023-11-24 21:42:23,420 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 457 transitions. [2023-11-24 21:42:23,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 457 transitions. [2023-11-24 21:42:23,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:23,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 457 transitions. [2023-11-24 21:42:23,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 35.15384615384615) internal successors, (457), 13 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:23,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 58.0) internal successors, (812), 14 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:23,468 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 58.0) internal successors, (812), 14 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:23,468 INFO L175 Difference]: Start difference. First operand has 89 places, 75 transitions, 332 flow. Second operand 13 states and 457 transitions. [2023-11-24 21:42:23,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 149 transitions, 855 flow [2023-11-24 21:42:23,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 149 transitions, 850 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:42:23,474 INFO L231 Difference]: Finished difference. Result has 102 places, 87 transitions, 513 flow [2023-11-24 21:42:23,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=513, PETRI_PLACES=102, PETRI_TRANSITIONS=87} [2023-11-24 21:42:23,477 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 45 predicate places. [2023-11-24 21:42:23,478 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 87 transitions, 513 flow [2023-11-24 21:42:23,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 28.833333333333332) internal successors, (346), 12 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:23,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:23,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:42:23,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-24 21:42:23,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:42:23,682 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:42:23,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:23,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1863836630, now seen corresponding path program 1 times [2023-11-24 21:42:23,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:42:23,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40548265] [2023-11-24 21:42:23,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:23,683 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 [2023-11-24 21:42:23,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:42:23,685 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:42:23,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-24 21:42:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:23,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 21:42:23,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:42:23,854 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 [2023-11-24 21:42:23,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:23,887 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 [2023-11-24 21:42:23,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:23,898 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 [2023-11-24 21:42:23,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:23,910 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 [2023-11-24 21:42:23,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:23,921 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 [2023-11-24 21:42:23,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:23,933 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 [2023-11-24 21:42:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:24,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:42:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:25,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:42:25,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40548265] [2023-11-24 21:42:25,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40548265] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:42:25,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:42:25,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-24 21:42:25,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476527149] [2023-11-24 21:42:25,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:42:25,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 21:42:25,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:42:25,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 21:42:25,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:42:27,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 58 [2023-11-24 21:42:27,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 87 transitions, 513 flow. Second operand has 12 states, 12 states have (on average 28.333333333333332) internal successors, (340), 12 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:27,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:27,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 58 [2023-11-24 21:42:27,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:30,835 INFO L124 PetriNetUnfolderBase]: 922/1911 cut-off events. [2023-11-24 21:42:30,835 INFO L125 PetriNetUnfolderBase]: For 1924/1984 co-relation queries the response was YES. [2023-11-24 21:42:30,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5288 conditions, 1911 events. 922/1911 cut-off events. For 1924/1984 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12478 event pairs, 367 based on Foata normal form. 60/1811 useless extension candidates. Maximal degree in co-relation 5255. Up to 863 conditions per place. [2023-11-24 21:42:30,856 INFO L140 encePairwiseOnDemand]: 49/58 looper letters, 128 selfloop transitions, 33 changer transitions 1/177 dead transitions. [2023-11-24 21:42:30,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 177 transitions, 1161 flow [2023-11-24 21:42:30,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:42:30,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-24 21:42:30,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 493 transitions. [2023-11-24 21:42:30,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2023-11-24 21:42:30,861 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 493 transitions. [2023-11-24 21:42:30,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 493 transitions. [2023-11-24 21:42:30,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:30,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 493 transitions. [2023-11-24 21:42:30,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 35.214285714285715) internal successors, (493), 14 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:30,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:30,866 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:30,866 INFO L175 Difference]: Start difference. First operand has 102 places, 87 transitions, 513 flow. Second operand 14 states and 493 transitions. [2023-11-24 21:42:30,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 177 transitions, 1161 flow [2023-11-24 21:42:30,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 177 transitions, 1133 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-24 21:42:30,882 INFO L231 Difference]: Finished difference. Result has 115 places, 94 transitions, 626 flow [2023-11-24 21:42:30,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=626, PETRI_PLACES=115, PETRI_TRANSITIONS=94} [2023-11-24 21:42:30,883 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 58 predicate places. [2023-11-24 21:42:30,883 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 94 transitions, 626 flow [2023-11-24 21:42:30,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 28.333333333333332) internal successors, (340), 12 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:30,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:30,884 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:42:30,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-24 21:42:31,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:42:31,092 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:42:31,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:31,093 INFO L85 PathProgramCache]: Analyzing trace with hash -87998936, now seen corresponding path program 2 times [2023-11-24 21:42:31,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:42:31,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237074328] [2023-11-24 21:42:31,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:42:31,094 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 [2023-11-24 21:42:31,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:42:31,095 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:42:31,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-24 21:42:31,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-24 21:42:31,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:42:31,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:42:31,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:42:31,224 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 [2023-11-24 21:42:31,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:31,233 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 [2023-11-24 21:42:31,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:31,245 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 [2023-11-24 21:42:31,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:31,263 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 [2023-11-24 21:42:31,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:31,274 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 [2023-11-24 21:42:31,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:31,280 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 [2023-11-24 21:42:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 21:42:31,551 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:42:31,551 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:42:31,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237074328] [2023-11-24 21:42:31,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237074328] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:42:31,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:42:31,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:42:31,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806205515] [2023-11-24 21:42:31,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:31,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:42:31,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:42:31,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:42:31,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:42:31,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2023-11-24 21:42:31,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 94 transitions, 626 flow. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:31,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:31,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2023-11-24 21:42:31,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:32,356 INFO L124 PetriNetUnfolderBase]: 803/1733 cut-off events. [2023-11-24 21:42:32,356 INFO L125 PetriNetUnfolderBase]: For 2155/2213 co-relation queries the response was YES. [2023-11-24 21:42:32,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5087 conditions, 1733 events. 803/1733 cut-off events. For 2155/2213 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11507 event pairs, 353 based on Foata normal form. 85/1711 useless extension candidates. Maximal degree in co-relation 5049. Up to 905 conditions per place. [2023-11-24 21:42:32,377 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 53 selfloop transitions, 31 changer transitions 0/101 dead transitions. [2023-11-24 21:42:32,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 101 transitions, 822 flow [2023-11-24 21:42:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:42:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:42:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2023-11-24 21:42:32,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2023-11-24 21:42:32,380 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 170 transitions. [2023-11-24 21:42:32,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 170 transitions. [2023-11-24 21:42:32,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:32,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 170 transitions. [2023-11-24 21:42:32,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:32,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 58.0) internal successors, (348), 6 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:32,383 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 58.0) internal successors, (348), 6 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:32,383 INFO L175 Difference]: Start difference. First operand has 115 places, 94 transitions, 626 flow. Second operand 5 states and 170 transitions. [2023-11-24 21:42:32,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 101 transitions, 822 flow [2023-11-24 21:42:32,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 101 transitions, 780 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-24 21:42:32,395 INFO L231 Difference]: Finished difference. Result has 110 places, 92 transitions, 634 flow [2023-11-24 21:42:32,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=634, PETRI_PLACES=110, PETRI_TRANSITIONS=92} [2023-11-24 21:42:32,396 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 53 predicate places. [2023-11-24 21:42:32,396 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 92 transitions, 634 flow [2023-11-24 21:42:32,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:32,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:32,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:42:32,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-24 21:42:32,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:42:32,600 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:42:32,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:32,600 INFO L85 PathProgramCache]: Analyzing trace with hash -649880547, now seen corresponding path program 1 times [2023-11-24 21:42:32,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:42:32,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530226012] [2023-11-24 21:42:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:32,601 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 [2023-11-24 21:42:32,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:42:32,602 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:42:32,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-24 21:42:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:32,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:42:32,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:42:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:32,749 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:42:32,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:42:32,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530226012] [2023-11-24 21:42:32,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530226012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:42:32,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:42:32,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:42:32,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262344971] [2023-11-24 21:42:32,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:32,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:42:32,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:42:32,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:42:32,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:42:32,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2023-11-24 21:42:32,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 92 transitions, 634 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 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) [2023-11-24 21:42:32,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:32,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2023-11-24 21:42:32,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:33,134 INFO L124 PetriNetUnfolderBase]: 852/1859 cut-off events. [2023-11-24 21:42:33,134 INFO L125 PetriNetUnfolderBase]: For 2991/3049 co-relation queries the response was YES. [2023-11-24 21:42:33,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5571 conditions, 1859 events. 852/1859 cut-off events. For 2991/3049 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12333 event pairs, 399 based on Foata normal form. 66/1815 useless extension candidates. Maximal degree in co-relation 5534. Up to 965 conditions per place. [2023-11-24 21:42:33,155 INFO L140 encePairwiseOnDemand]: 55/58 looper letters, 85 selfloop transitions, 5 changer transitions 7/114 dead transitions. [2023-11-24 21:42:33,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 114 transitions, 964 flow [2023-11-24 21:42:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:42:33,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:42:33,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2023-11-24 21:42:33,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2023-11-24 21:42:33,157 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 122 transitions. [2023-11-24 21:42:33,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 122 transitions. [2023-11-24 21:42:33,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:33,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 122 transitions. [2023-11-24 21:42:33,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:33,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:33,159 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:33,159 INFO L175 Difference]: Start difference. First operand has 110 places, 92 transitions, 634 flow. Second operand 3 states and 122 transitions. [2023-11-24 21:42:33,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 114 transitions, 964 flow [2023-11-24 21:42:33,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 114 transitions, 884 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:42:33,171 INFO L231 Difference]: Finished difference. Result has 109 places, 88 transitions, 555 flow [2023-11-24 21:42:33,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=555, PETRI_PLACES=109, PETRI_TRANSITIONS=88} [2023-11-24 21:42:33,172 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 52 predicate places. [2023-11-24 21:42:33,172 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 88 transitions, 555 flow [2023-11-24 21:42:33,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 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) [2023-11-24 21:42:33,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:33,173 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:42:33,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-24 21:42:33,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:42:33,376 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:42:33,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:33,376 INFO L85 PathProgramCache]: Analyzing trace with hash -219353242, now seen corresponding path program 1 times [2023-11-24 21:42:33,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:42:33,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879831385] [2023-11-24 21:42:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:33,377 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 [2023-11-24 21:42:33,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:42:33,378 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:42:33,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-24 21:42:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:33,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 21:42:33,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:42:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:33,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:42:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:34,578 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:42:34,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879831385] [2023-11-24 21:42:34,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879831385] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:42:34,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:42:34,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-24 21:42:34,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709235821] [2023-11-24 21:42:34,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:42:34,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:42:34,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:42:34,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:42:34,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:42:35,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2023-11-24 21:42:35,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 88 transitions, 555 flow. Second operand has 14 states, 14 states have (on average 30.142857142857142) internal successors, (422), 14 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:35,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:35,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2023-11-24 21:42:35,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:35,946 INFO L124 PetriNetUnfolderBase]: 576/1318 cut-off events. [2023-11-24 21:42:35,946 INFO L125 PetriNetUnfolderBase]: For 1952/2000 co-relation queries the response was YES. [2023-11-24 21:42:35,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4001 conditions, 1318 events. 576/1318 cut-off events. For 1952/2000 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8474 event pairs, 327 based on Foata normal form. 64/1308 useless extension candidates. Maximal degree in co-relation 3963. Up to 626 conditions per place. [2023-11-24 21:42:35,960 INFO L140 encePairwiseOnDemand]: 49/58 looper letters, 67 selfloop transitions, 34 changer transitions 7/125 dead transitions. [2023-11-24 21:42:35,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 125 transitions, 916 flow [2023-11-24 21:42:35,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:42:35,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:42:35,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 350 transitions. [2023-11-24 21:42:35,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2023-11-24 21:42:35,963 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 350 transitions. [2023-11-24 21:42:35,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 350 transitions. [2023-11-24 21:42:35,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:35,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 350 transitions. [2023-11-24 21:42:35,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:35,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:35,967 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:35,968 INFO L175 Difference]: Start difference. First operand has 109 places, 88 transitions, 555 flow. Second operand 10 states and 350 transitions. [2023-11-24 21:42:35,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 125 transitions, 916 flow [2023-11-24 21:42:35,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 125 transitions, 889 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-24 21:42:35,979 INFO L231 Difference]: Finished difference. Result has 115 places, 93 transitions, 677 flow [2023-11-24 21:42:35,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=677, PETRI_PLACES=115, PETRI_TRANSITIONS=93} [2023-11-24 21:42:35,980 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 58 predicate places. [2023-11-24 21:42:35,980 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 93 transitions, 677 flow [2023-11-24 21:42:35,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 30.142857142857142) internal successors, (422), 14 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:35,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:35,981 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2023-11-24 21:42:35,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-11-24 21:42:36,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:42:36,185 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:42:36,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:36,186 INFO L85 PathProgramCache]: Analyzing trace with hash -209871601, now seen corresponding path program 3 times [2023-11-24 21:42:36,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:42:36,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437344981] [2023-11-24 21:42:36,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:42:36,186 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 [2023-11-24 21:42:36,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:42:36,187 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:42:36,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88b4b3-ae56-4f40-9c49-d32df81ee7f1/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-24 21:42:36,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-24 21:42:36,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:42:36,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-24 21:42:36,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:42:36,499 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 [2023-11-24 21:42:36,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:36,510 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 [2023-11-24 21:42:36,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:36,520 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 [2023-11-24 21:42:36,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:36,527 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 [2023-11-24 21:42:36,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:36,538 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 [2023-11-24 21:42:36,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:36,559 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 [2023-11-24 21:42:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:37,236 INFO L327 TraceCheckSpWp]: Computing backward predicates...