./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-word-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:05:49,799 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:05:49,951 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 23:05:49,960 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:05:49,962 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:05:50,011 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:05:50,013 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:05:50,014 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:05:50,015 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:05:50,022 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:05:50,023 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:05:50,024 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:05:50,025 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:05:50,027 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:05:50,028 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:05:50,028 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:05:50,029 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:05:50,030 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:05:50,030 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 23:05:50,031 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 23:05:50,032 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 23:05:50,032 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:05:50,033 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 23:05:50,034 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:05:50,034 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:05:50,035 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:05:50,036 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:05:50,037 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:05:50,037 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:05:50,038 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:05:50,040 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:05:50,040 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:05:50,041 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:05:50,041 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:05:50,041 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:05:50,042 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:05:50,042 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:05:50,042 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:05:50,043 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_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 [2023-11-06 23:05:50,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:05:50,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:05:50,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:05:50,433 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:05:50,434 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:05:50,435 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/chl-word-trans.wvr.c [2023-11-06 23:05:54,218 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:05:54,571 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:05:54,572 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/sv-benchmarks/c/weaver/chl-word-trans.wvr.c [2023-11-06 23:05:54,583 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/data/18dfcf468/dc50a0abbbae44348b671c96ddcbb5bb/FLAG518bf4221 [2023-11-06 23:05:54,598 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/data/18dfcf468/dc50a0abbbae44348b671c96ddcbb5bb [2023-11-06 23:05:54,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:05:54,604 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:05:54,605 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:05:54,606 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:05:54,613 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:05:54,613 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:05:54" (1/1) ... [2023-11-06 23:05:54,615 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30852f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:54, skipping insertion in model container [2023-11-06 23:05:54,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:05:54" (1/1) ... [2023-11-06 23:05:54,651 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:05:54,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:05:54,911 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) [2023-11-06 23:05:54,912 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2c78a5d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:54, skipping insertion in model container [2023-11-06 23:05:54,912 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:05:54,913 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 23:05:54,915 INFO L158 Benchmark]: Toolchain (without parser) took 310.68ms. Allocated memory is still 148.9MB. Free memory was 115.8MB in the beginning and 105.5MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 23:05:54,916 INFO L158 Benchmark]: CDTParser took 1.06ms. Allocated memory is still 107.0MB. Free memory was 51.7MB in the beginning and 51.6MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 23:05:54,917 INFO L158 Benchmark]: CACSL2BoogieTranslator took 307.50ms. Allocated memory is still 148.9MB. Free memory was 115.8MB in the beginning and 105.5MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 23:05:54,919 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.06ms. Allocated memory is still 107.0MB. Free memory was 51.7MB in the beginning and 51.6MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 307.50ms. Allocated memory is still 148.9MB. Free memory was 115.8MB in the beginning and 105.5MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 137]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:05:57,858 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:05:57,964 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 23:05:57,972 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:05:57,973 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:05:58,011 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:05:58,012 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:05:58,013 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:05:58,014 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:05:58,014 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:05:58,016 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:05:58,016 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:05:58,017 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:05:58,018 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:05:58,019 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:05:58,019 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:05:58,020 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:05:58,021 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:05:58,021 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 23:05:58,022 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 23:05:58,023 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 23:05:58,023 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:05:58,024 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 23:05:58,025 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 23:05:58,025 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 23:05:58,026 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:05:58,027 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:05:58,027 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:05:58,028 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:05:58,028 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:05:58,029 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:05:58,029 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:05:58,030 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:05:58,031 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:05:58,031 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 23:05:58,032 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 23:05:58,032 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:05:58,032 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:05:58,033 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:05:58,033 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 23:05:58,034 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:05:58,036 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_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 [2023-11-06 23:05:58,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:05:58,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:05:58,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:05:58,618 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:05:58,619 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:05:58,621 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/chl-word-trans.wvr.c [2023-11-06 23:06:02,321 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:06:02,691 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:06:02,692 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/sv-benchmarks/c/weaver/chl-word-trans.wvr.c [2023-11-06 23:06:02,702 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/data/74c5eb2c5/417897f7ff7c4c379e524b70a0df7ab7/FLAG8224d992f [2023-11-06 23:06:02,721 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/data/74c5eb2c5/417897f7ff7c4c379e524b70a0df7ab7 [2023-11-06 23:06:02,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:06:02,726 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:06:02,728 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:06:02,729 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:06:02,736 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:06:02,737 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:06:02" (1/1) ... [2023-11-06 23:06:02,738 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@373573ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:02, skipping insertion in model container [2023-11-06 23:06:02,739 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:06:02" (1/1) ... [2023-11-06 23:06:02,773 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:06:03,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:06:03,145 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 23:06:03,161 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:06:03,221 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:06:03,237 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:06:03,315 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:06:03,344 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:06:03,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:03 WrapperNode [2023-11-06 23:06:03,345 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:06:03,346 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:06:03,347 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:06:03,347 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:06:03,357 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:03" (1/1) ... [2023-11-06 23:06:03,391 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:03" (1/1) ... [2023-11-06 23:06:03,448 INFO L138 Inliner]: procedures = 27, calls = 45, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 176 [2023-11-06 23:06:03,449 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:06:03,451 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:06:03,451 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:06:03,451 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:06:03,464 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:03" (1/1) ... [2023-11-06 23:06:03,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:03" (1/1) ... [2023-11-06 23:06:03,493 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:03" (1/1) ... [2023-11-06 23:06:03,493 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:03" (1/1) ... [2023-11-06 23:06:03,509 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:03" (1/1) ... [2023-11-06 23:06:03,515 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:03" (1/1) ... [2023-11-06 23:06:03,519 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:03" (1/1) ... [2023-11-06 23:06:03,523 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:03" (1/1) ... [2023-11-06 23:06:03,534 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:06:03,535 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:06:03,548 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:06:03,548 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:06:03,550 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:03" (1/1) ... [2023-11-06 23:06:03,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:06:03,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:03,598 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:06:03,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:06:03,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:06:03,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 23:06:03,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:06:03,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 23:06:03,666 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:06:03,666 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:06:03,666 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:06:03,666 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:06:03,667 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 23:06:03,667 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 23:06:03,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:06:03,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:06:03,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:06:03,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:06:03,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 23:06:03,674 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:06:03,890 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:06:03,893 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:06:05,039 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:06:05,055 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:06:05,055 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-06 23:06:05,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:06:05 BoogieIcfgContainer [2023-11-06 23:06:05,059 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:06:05,062 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:06:05,062 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:06:05,066 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:06:05,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:06:02" (1/3) ... [2023-11-06 23:06:05,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bb78656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:06:05, skipping insertion in model container [2023-11-06 23:06:05,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:03" (2/3) ... [2023-11-06 23:06:05,068 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bb78656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:06:05, skipping insertion in model container [2023-11-06 23:06:05,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:06:05" (3/3) ... [2023-11-06 23:06:05,070 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-trans.wvr.c [2023-11-06 23:06:05,095 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:06:05,095 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-06 23:06:05,095 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:06:05,375 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 23:06:05,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 353 transitions, 727 flow [2023-11-06 23:06:05,680 INFO L124 PetriNetUnfolderBase]: 28/350 cut-off events. [2023-11-06 23:06:05,680 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:06:05,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 350 events. 28/350 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 638 event pairs, 0 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 271. Up to 3 conditions per place. [2023-11-06 23:06:05,694 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 353 transitions, 727 flow [2023-11-06 23:06:05,717 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 327 places, 345 transitions, 708 flow [2023-11-06 23:06:05,729 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:06:05,745 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 327 places, 345 transitions, 708 flow [2023-11-06 23:06:05,752 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 327 places, 345 transitions, 708 flow [2023-11-06 23:06:05,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 327 places, 345 transitions, 708 flow [2023-11-06 23:06:05,890 INFO L124 PetriNetUnfolderBase]: 28/345 cut-off events. [2023-11-06 23:06:05,890 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:06:05,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 345 events. 28/345 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 638 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 271. Up to 3 conditions per place. [2023-11-06 23:06:05,911 INFO L119 LiptonReduction]: Number of co-enabled transitions 13338 [2023-11-06 23:06:59,535 INFO L134 LiptonReduction]: Checked pairs total: 24973 [2023-11-06 23:06:59,536 INFO L136 LiptonReduction]: Total number of compositions: 401 [2023-11-06 23:06:59,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:06:59,564 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;@1206e6ea, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:06:59,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-11-06 23:06:59,568 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:06:59,569 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 23:06:59,569 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:06:59,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:59,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:06:59,571 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:06:59,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:59,578 INFO L85 PathProgramCache]: Analyzing trace with hash 43826, now seen corresponding path program 1 times [2023-11-06 23:06:59,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:06:59,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748242525] [2023-11-06 23:06:59,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:59,625 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 [2023-11-06 23:06:59,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:06:59,632 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:06:59,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:06:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:59,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:06:59,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:59,856 INFO L351 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 [2023-11-06 23:06:59,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:59,908 INFO L351 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 [2023-11-06 23:06:59,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:59,919 INFO L351 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 [2023-11-06 23:06:59,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:59,945 INFO L351 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 [2023-11-06 23:06:59,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:59,969 INFO L351 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 [2023-11-06 23:06:59,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:59,996 INFO L351 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 [2023-11-06 23:07:00,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:00,016 INFO L351 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 [2023-11-06 23:07:00,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:00,031 INFO L351 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 [2023-11-06 23:07:00,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:00,067 INFO L351 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 [2023-11-06 23:07:00,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:00,083 INFO L351 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 [2023-11-06 23:07:00,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:00,095 INFO L351 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 [2023-11-06 23:07:00,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:00,112 INFO L351 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 [2023-11-06 23:07:00,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:00,177 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 23:07:00,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:00,213 INFO L351 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 [2023-11-06 23:07:00,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:00,251 INFO L351 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 [2023-11-06 23:07:00,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:00,268 INFO L351 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 [2023-11-06 23:07:00,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:00,301 INFO L351 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 [2023-11-06 23:07:00,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:00,316 INFO L351 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 [2023-11-06 23:07:00,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:00,359 INFO L351 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 [2023-11-06 23:07:00,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:00,372 INFO L351 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 [2023-11-06 23:07:00,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:00,392 INFO L351 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 [2023-11-06 23:07:00,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:00,404 INFO L351 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 [2023-11-06 23:07:00,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:00,415 INFO L351 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 [2023-11-06 23:07:00,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:00,426 INFO L351 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 [2023-11-06 23:07:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:00,437 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:07:00,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:07:00,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748242525] [2023-11-06 23:07:00,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748242525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:00,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:00,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:07:00,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710074376] [2023-11-06 23:07:00,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:00,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:07:00,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:07:00,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:07:00,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:07:00,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 754 [2023-11-06 23:07:00,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 315.6666666666667) internal successors, (947), 3 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:00,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:00,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 754 [2023-11-06 23:07:00,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:06,865 INFO L124 PetriNetUnfolderBase]: 20232/26991 cut-off events. [2023-11-06 23:07:06,866 INFO L125 PetriNetUnfolderBase]: For 487/487 co-relation queries the response was YES. [2023-11-06 23:07:06,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54515 conditions, 26991 events. 20232/26991 cut-off events. For 487/487 co-relation queries the response was YES. Maximal size of possible extension queue 1387. Compared 142260 event pairs, 15757 based on Foata normal form. 0/8337 useless extension candidates. Maximal degree in co-relation 51676. Up to 26983 conditions per place. [2023-11-06 23:07:07,116 INFO L140 encePairwiseOnDemand]: 742/754 looper letters, 70 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2023-11-06 23:07:07,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 314 flow [2023-11-06 23:07:07,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:07:07,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:07:07,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1027 transitions. [2023-11-06 23:07:07,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4540229885057471 [2023-11-06 23:07:07,141 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1027 transitions. [2023-11-06 23:07:07,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1027 transitions. [2023-11-06 23:07:07,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:07,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1027 transitions. [2023-11-06 23:07:07,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 342.3333333333333) internal successors, (1027), 3 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:07,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:07,169 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:07,171 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 182 flow. Second operand 3 states and 1027 transitions. [2023-11-06 23:07:07,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 314 flow [2023-11-06 23:07:07,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 74 transitions, 302 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 23:07:07,188 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 162 flow [2023-11-06 23:07:07,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2023-11-06 23:07:07,196 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -12 predicate places. [2023-11-06 23:07:07,196 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 162 flow [2023-11-06 23:07:07,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 315.6666666666667) internal successors, (947), 3 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:07,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:07,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:07:07,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-06 23:07:07,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:07:07,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:07:07,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:07,412 INFO L85 PathProgramCache]: Analyzing trace with hash 43824, now seen corresponding path program 1 times [2023-11-06 23:07:07,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:07:07,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318148516] [2023-11-06 23:07:07,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:07,413 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 [2023-11-06 23:07:07,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:07:07,415 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:07:07,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:07:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:07,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:07:07,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:07,553 INFO L351 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 [2023-11-06 23:07:07,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:07,572 INFO L351 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 [2023-11-06 23:07:07,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:07,595 INFO L351 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 [2023-11-06 23:07:07,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:07,633 INFO L351 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 [2023-11-06 23:07:07,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:07,645 INFO L351 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 [2023-11-06 23:07:07,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:07,661 INFO L351 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 [2023-11-06 23:07:07,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:07,685 INFO L351 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 [2023-11-06 23:07:07,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:07,715 INFO L351 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 [2023-11-06 23:07:07,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:07,753 INFO L351 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 [2023-11-06 23:07:07,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:07,796 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 23:07:07,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:07,830 INFO L351 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 [2023-11-06 23:07:07,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:07,847 INFO L351 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 [2023-11-06 23:07:07,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:07,865 INFO L351 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 [2023-11-06 23:07:07,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:07,879 INFO L351 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 [2023-11-06 23:07:07,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:07,899 INFO L351 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 [2023-11-06 23:07:07,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:07,928 INFO L351 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 [2023-11-06 23:07:07,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:07,944 INFO L351 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 [2023-11-06 23:07:07,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:07,953 INFO L351 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 [2023-11-06 23:07:07,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:07,973 INFO L351 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 [2023-11-06 23:07:07,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:07,998 INFO L351 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 [2023-11-06 23:07:08,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:08,010 INFO L351 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 [2023-11-06 23:07:08,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:08,024 INFO L351 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 [2023-11-06 23:07:08,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:08,040 INFO L351 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 [2023-11-06 23:07:08,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:08,050 INFO L351 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 [2023-11-06 23:07:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:08,075 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:07:08,076 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:07:08,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318148516] [2023-11-06 23:07:08,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318148516] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:08,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:08,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:07:08,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471608585] [2023-11-06 23:07:08,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:08,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:07:08,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:07:08,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:07:08,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:07:08,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 754 [2023-11-06 23:07:08,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:08,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:08,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 754 [2023-11-06 23:07:08,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:13,236 INFO L124 PetriNetUnfolderBase]: 20237/26999 cut-off events. [2023-11-06 23:07:13,236 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-11-06 23:07:13,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54219 conditions, 26999 events. 20237/26999 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 1388. Compared 142226 event pairs, 15757 based on Foata normal form. 0/8342 useless extension candidates. Maximal degree in co-relation 54169. Up to 26995 conditions per place. [2023-11-06 23:07:13,414 INFO L140 encePairwiseOnDemand]: 742/754 looper letters, 73 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2023-11-06 23:07:13,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 82 transitions, 348 flow [2023-11-06 23:07:13,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:07:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:07:13,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1021 transitions. [2023-11-06 23:07:13,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45137046861184793 [2023-11-06 23:07:13,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1021 transitions. [2023-11-06 23:07:13,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1021 transitions. [2023-11-06 23:07:13,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:13,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1021 transitions. [2023-11-06 23:07:13,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.3333333333333) internal successors, (1021), 3 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:13,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:13,434 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:13,434 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 162 flow. Second operand 3 states and 1021 transitions. [2023-11-06 23:07:13,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 82 transitions, 348 flow [2023-11-06 23:07:13,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 82 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:07:13,438 INFO L231 Difference]: Finished difference. Result has 71 places, 82 transitions, 228 flow [2023-11-06 23:07:13,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=71, PETRI_TRANSITIONS=82} [2023-11-06 23:07:13,439 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -10 predicate places. [2023-11-06 23:07:13,440 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 82 transitions, 228 flow [2023-11-06 23:07:13,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:13,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:13,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:07:13,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:07:13,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:07:13,652 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:07:13,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:13,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1363990, now seen corresponding path program 1 times [2023-11-06 23:07:13,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:07:13,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608700545] [2023-11-06 23:07:13,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:13,653 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 [2023-11-06 23:07:13,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:07:13,695 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:07:13,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:07:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:13,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:07:13,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:13,808 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-06 23:07:13,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:13,837 INFO L351 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 [2023-11-06 23:07:13,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:13,853 INFO L351 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 [2023-11-06 23:07:13,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:13,874 INFO L351 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 [2023-11-06 23:07:13,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:13,900 INFO L351 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 [2023-11-06 23:07:13,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:13,914 INFO L351 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 [2023-11-06 23:07:13,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:13,940 INFO L351 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 [2023-11-06 23:07:13,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:13,952 INFO L351 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 [2023-11-06 23:07:13,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:13,962 INFO L351 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 [2023-11-06 23:07:13,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:13,973 INFO L351 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 [2023-11-06 23:07:13,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:13,986 INFO L351 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 [2023-11-06 23:07:13,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:13,994 INFO L351 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 [2023-11-06 23:07:14,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:14,009 INFO L351 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 [2023-11-06 23:07:14,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:14,017 INFO L351 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 [2023-11-06 23:07:14,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:14,030 INFO L351 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 [2023-11-06 23:07:14,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:14,038 INFO L351 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 [2023-11-06 23:07:14,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:14,063 INFO L351 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 [2023-11-06 23:07:14,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:14,076 INFO L351 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 [2023-11-06 23:07:14,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:14,092 INFO L351 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 [2023-11-06 23:07:14,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:14,100 INFO L351 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 [2023-11-06 23:07:14,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:14,116 INFO L351 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 [2023-11-06 23:07:14,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:14,146 INFO L351 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 [2023-11-06 23:07:14,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:14,156 INFO L351 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 [2023-11-06 23:07:14,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:14,172 INFO L351 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 [2023-11-06 23:07:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:14,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:14,626 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:07:14,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608700545] [2023-11-06 23:07:14,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608700545] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:14,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:07:14,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 23:07:14,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172810568] [2023-11-06 23:07:14,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:14,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:07:14,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:07:14,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:07:14,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:07:17,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 754 [2023-11-06 23:07:17,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 82 transitions, 228 flow. Second operand has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:17,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:17,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 754 [2023-11-06 23:07:17,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:20,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:07:22,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:07:26,957 INFO L124 PetriNetUnfolderBase]: 20251/27021 cut-off events. [2023-11-06 23:07:26,958 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-11-06 23:07:26,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54313 conditions, 27021 events. 20251/27021 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 1401. Compared 142089 event pairs, 15757 based on Foata normal form. 0/8357 useless extension candidates. Maximal degree in co-relation 54169. Up to 27004 conditions per place. [2023-11-06 23:07:27,128 INFO L140 encePairwiseOnDemand]: 742/754 looper letters, 73 selfloop transitions, 31 changer transitions 0/104 dead transitions. [2023-11-06 23:07:27,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 104 transitions, 534 flow [2023-11-06 23:07:27,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:07:27,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:07:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1894 transitions. [2023-11-06 23:07:27,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186560565870911 [2023-11-06 23:07:27,139 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1894 transitions. [2023-11-06 23:07:27,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1894 transitions. [2023-11-06 23:07:27,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:27,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1894 transitions. [2023-11-06 23:07:27,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 315.6666666666667) internal successors, (1894), 6 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:27,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 754.0) internal successors, (5278), 7 states have internal predecessors, (5278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:27,168 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 754.0) internal successors, (5278), 7 states have internal predecessors, (5278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:27,168 INFO L175 Difference]: Start difference. First operand has 71 places, 82 transitions, 228 flow. Second operand 6 states and 1894 transitions. [2023-11-06 23:07:27,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 104 transitions, 534 flow [2023-11-06 23:07:27,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 104 transitions, 506 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:07:27,174 INFO L231 Difference]: Finished difference. Result has 77 places, 104 transitions, 418 flow [2023-11-06 23:07:27,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=77, PETRI_TRANSITIONS=104} [2023-11-06 23:07:27,176 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -4 predicate places. [2023-11-06 23:07:27,176 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 104 transitions, 418 flow [2023-11-06 23:07:27,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:27,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:27,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:07:27,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:07:27,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:07:27,393 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:07:27,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:27,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1312943746, now seen corresponding path program 1 times [2023-11-06 23:07:27,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:07:27,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035974515] [2023-11-06 23:07:27,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:27,394 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 [2023-11-06 23:07:27,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:07:27,396 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:07:27,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:07:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:27,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 23:07:27,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:27,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:27,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:27,685 INFO L351 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 [2023-11-06 23:07:27,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:27,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:27,713 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-06 23:07:27,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:27,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:27,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:27,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:27,811 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 23:07:27,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:27,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:27,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:27,856 INFO L351 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 [2023-11-06 23:07:27,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:27,911 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 23:07:28,014 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:07:28,014 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-06 23:07:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:28,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:28,774 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:07:28,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035974515] [2023-11-06 23:07:28,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035974515] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:28,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:07:28,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2023-11-06 23:07:28,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034666361] [2023-11-06 23:07:28,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:28,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:07:28,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:07:28,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:07:28,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:07:34,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 754 [2023-11-06 23:07:34,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 104 transitions, 418 flow. Second operand has 6 states, 6 states have (on average 298.8333333333333) internal successors, (1793), 6 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:34,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:34,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 754 [2023-11-06 23:07:34,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:40,398 INFO L124 PetriNetUnfolderBase]: 15543/20940 cut-off events. [2023-11-06 23:07:40,398 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2023-11-06 23:07:40,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42194 conditions, 20940 events. 15543/20940 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 108925 event pairs, 12033 based on Foata normal form. 0/6987 useless extension candidates. Maximal degree in co-relation 42120. Up to 20940 conditions per place. [2023-11-06 23:07:40,529 INFO L140 encePairwiseOnDemand]: 751/754 looper letters, 97 selfloop transitions, 1 changer transitions 0/98 dead transitions. [2023-11-06 23:07:40,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 98 transitions, 579 flow [2023-11-06 23:07:40,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:07:40,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:07:40,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 968 transitions. [2023-11-06 23:07:40,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42793987621573826 [2023-11-06 23:07:40,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 968 transitions. [2023-11-06 23:07:40,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 968 transitions. [2023-11-06 23:07:40,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:40,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 968 transitions. [2023-11-06 23:07:40,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:40,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:40,553 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:40,553 INFO L175 Difference]: Start difference. First operand has 77 places, 104 transitions, 418 flow. Second operand 3 states and 968 transitions. [2023-11-06 23:07:40,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 98 transitions, 579 flow [2023-11-06 23:07:40,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 98 transitions, 538 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-11-06 23:07:40,560 INFO L231 Difference]: Finished difference. Result has 76 places, 98 transitions, 344 flow [2023-11-06 23:07:40,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=344, PETRI_PLACES=76, PETRI_TRANSITIONS=98} [2023-11-06 23:07:40,562 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -5 predicate places. [2023-11-06 23:07:40,562 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 98 transitions, 344 flow [2023-11-06 23:07:40,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 298.8333333333333) internal successors, (1793), 6 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:40,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:40,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:07:40,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-06 23:07:40,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:07:40,779 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:07:40,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:40,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1312943744, now seen corresponding path program 1 times [2023-11-06 23:07:40,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:07:40,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967286901] [2023-11-06 23:07:40,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:40,780 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 [2023-11-06 23:07:40,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:07:40,781 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:07:40,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:07:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:40,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:07:40,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:41,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:41,103 INFO L322 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2023-11-06 23:07:41,104 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 37 [2023-11-06 23:07:41,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:41,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:41,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:41,162 INFO L322 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2023-11-06 23:07:41,163 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2023-11-06 23:07:41,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:41,202 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 23:07:41,268 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:07:41,269 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 23:07:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:07:41,311 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:07:41,312 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:07:41,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967286901] [2023-11-06 23:07:41,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967286901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:41,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:41,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:07:41,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724173358] [2023-11-06 23:07:41,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:41,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:07:41,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:07:41,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:07:41,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:07:41,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 754 [2023-11-06 23:07:41,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 98 transitions, 344 flow. Second operand has 4 states, 4 states have (on average 325.25) internal successors, (1301), 4 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:41,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:41,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 754 [2023-11-06 23:07:41,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:44,115 INFO L124 PetriNetUnfolderBase]: 10835/14859 cut-off events. [2023-11-06 23:07:44,116 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-11-06 23:07:44,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30002 conditions, 14859 events. 10835/14859 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 76520 event pairs, 8309 based on Foata normal form. 0/5617 useless extension candidates. Maximal degree in co-relation 29990. Up to 14859 conditions per place. [2023-11-06 23:07:44,190 INFO L140 encePairwiseOnDemand]: 751/754 looper letters, 91 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2023-11-06 23:07:44,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 92 transitions, 500 flow [2023-11-06 23:07:44,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:07:44,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:07:44,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1044 transitions. [2023-11-06 23:07:44,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2023-11-06 23:07:44,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1044 transitions. [2023-11-06 23:07:44,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1044 transitions. [2023-11-06 23:07:44,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:44,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1044 transitions. [2023-11-06 23:07:44,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:44,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:44,211 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:44,211 INFO L175 Difference]: Start difference. First operand has 76 places, 98 transitions, 344 flow. Second operand 3 states and 1044 transitions. [2023-11-06 23:07:44,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 92 transitions, 500 flow [2023-11-06 23:07:44,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 92 transitions, 499 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:07:44,216 INFO L231 Difference]: Finished difference. Result has 75 places, 92 transitions, 317 flow [2023-11-06 23:07:44,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=75, PETRI_TRANSITIONS=92} [2023-11-06 23:07:44,217 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -6 predicate places. [2023-11-06 23:07:44,217 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 92 transitions, 317 flow [2023-11-06 23:07:44,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 325.25) internal successors, (1301), 4 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:44,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:44,219 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 23:07:44,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:07:44,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:07:44,432 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:07:44,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:44,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1985328304, now seen corresponding path program 2 times [2023-11-06 23:07:44,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:07:44,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117656266] [2023-11-06 23:07:44,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:07:44,433 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 [2023-11-06 23:07:44,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:07:44,434 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:07:44,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:07:44,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:07:44,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:44,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:07:44,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:44,573 INFO L351 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 [2023-11-06 23:07:44,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,590 INFO L351 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 [2023-11-06 23:07:44,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,602 INFO L351 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 [2023-11-06 23:07:44,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,612 INFO L351 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 [2023-11-06 23:07:44,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,637 INFO L351 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 [2023-11-06 23:07:44,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,649 INFO L351 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 [2023-11-06 23:07:44,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,665 INFO L351 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 [2023-11-06 23:07:44,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,686 INFO L351 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 [2023-11-06 23:07:44,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,699 INFO L351 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 [2023-11-06 23:07:44,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,707 INFO L351 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 [2023-11-06 23:07:44,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,715 INFO L351 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 [2023-11-06 23:07:44,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,727 INFO L351 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 [2023-11-06 23:07:44,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,740 INFO L351 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 [2023-11-06 23:07:44,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,753 INFO L351 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 [2023-11-06 23:07:44,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,778 INFO L351 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 [2023-11-06 23:07:44,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,795 INFO L351 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 [2023-11-06 23:07:44,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,805 INFO L351 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 [2023-11-06 23:07:44,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,817 INFO L351 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 [2023-11-06 23:07:44,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,848 INFO L351 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 [2023-11-06 23:07:44,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,862 INFO L351 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 [2023-11-06 23:07:44,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,890 INFO L351 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 [2023-11-06 23:07:44,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,930 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 23:07:44,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,954 INFO L351 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 [2023-11-06 23:07:44,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:44,967 INFO L351 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 [2023-11-06 23:07:45,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:45,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:45,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:07:45,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117656266] [2023-11-06 23:07:45,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117656266] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:45,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:07:45,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 23:07:45,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37656975] [2023-11-06 23:07:45,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:45,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:07:45,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:07:45,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:07:45,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:07:58,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 754 [2023-11-06 23:07:58,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 92 transitions, 317 flow. Second operand has 12 states, 12 states have (on average 301.0) internal successors, (3612), 12 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:58,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:58,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 754 [2023-11-06 23:07:58,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:03,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:08:05,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:08:07,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:08:09,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:08:12,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:08:14,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:08:16,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:08:18,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:08:21,715 INFO L124 PetriNetUnfolderBase]: 10846/14881 cut-off events. [2023-11-06 23:08:21,715 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2023-11-06 23:08:21,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30082 conditions, 14881 events. 10846/14881 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 76622 event pairs, 8309 based on Foata normal form. 11/5639 useless extension candidates. Maximal degree in co-relation 30069. Up to 14844 conditions per place. [2023-11-06 23:08:21,807 INFO L140 encePairwiseOnDemand]: 744/754 looper letters, 69 selfloop transitions, 45 changer transitions 0/114 dead transitions. [2023-11-06 23:08:21,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 114 transitions, 668 flow [2023-11-06 23:08:21,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:08:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 23:08:21,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3725 transitions. [2023-11-06 23:08:21,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41169319186560566 [2023-11-06 23:08:21,828 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3725 transitions. [2023-11-06 23:08:21,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3725 transitions. [2023-11-06 23:08:21,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:21,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3725 transitions. [2023-11-06 23:08:21,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 310.4166666666667) internal successors, (3725), 12 states have internal predecessors, (3725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:21,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 754.0) internal successors, (9802), 13 states have internal predecessors, (9802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:21,873 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 754.0) internal successors, (9802), 13 states have internal predecessors, (9802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:21,873 INFO L175 Difference]: Start difference. First operand has 75 places, 92 transitions, 317 flow. Second operand 12 states and 3725 transitions. [2023-11-06 23:08:21,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 114 transitions, 668 flow [2023-11-06 23:08:21,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 114 transitions, 667 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:21,880 INFO L231 Difference]: Finished difference. Result has 92 places, 114 transitions, 598 flow [2023-11-06 23:08:21,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=598, PETRI_PLACES=92, PETRI_TRANSITIONS=114} [2023-11-06 23:08:21,881 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 11 predicate places. [2023-11-06 23:08:21,882 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 114 transitions, 598 flow [2023-11-06 23:08:21,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 301.0) internal successors, (3612), 12 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:21,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:21,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:08:21,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:08:22,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:22,098 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:08:22,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:22,098 INFO L85 PathProgramCache]: Analyzing trace with hash 2046564422, now seen corresponding path program 1 times [2023-11-06 23:08:22,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:22,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406148414] [2023-11-06 23:08:22,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:22,099 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:22,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:22,100 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:08:22,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:08:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:22,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:08:22,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:22,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,299 INFO L351 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 [2023-11-06 23:08:22,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,343 INFO L351 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 [2023-11-06 23:08:22,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,391 INFO L351 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 [2023-11-06 23:08:22,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,415 INFO L351 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 [2023-11-06 23:08:22,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,488 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 23:08:22,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,526 INFO L351 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 [2023-11-06 23:08:22,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,551 INFO L351 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 [2023-11-06 23:08:22,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,591 INFO L351 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 [2023-11-06 23:08:22,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,649 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 23:08:22,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:22,686 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 23:08:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:22,772 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:22,772 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:22,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406148414] [2023-11-06 23:08:22,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406148414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:22,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:22,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:08:22,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637866536] [2023-11-06 23:08:22,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:22,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:08:22,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:22,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:08:22,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:08:23,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 754 [2023-11-06 23:08:23,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 114 transitions, 598 flow. Second operand has 4 states, 4 states have (on average 325.5) internal successors, (1302), 4 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:23,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:23,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 754 [2023-11-06 23:08:23,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:26,084 INFO L124 PetriNetUnfolderBase]: 10606/14529 cut-off events. [2023-11-06 23:08:26,084 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2023-11-06 23:08:26,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29471 conditions, 14529 events. 10606/14529 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 74244 event pairs, 8121 based on Foata normal form. 0/5569 useless extension candidates. Maximal degree in co-relation 29450. Up to 14529 conditions per place. [2023-11-06 23:08:26,229 INFO L140 encePairwiseOnDemand]: 751/754 looper letters, 111 selfloop transitions, 1 changer transitions 0/112 dead transitions. [2023-11-06 23:08:26,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 112 transitions, 818 flow [2023-11-06 23:08:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:26,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1042 transitions. [2023-11-06 23:08:26,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46065428824049515 [2023-11-06 23:08:26,237 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1042 transitions. [2023-11-06 23:08:26,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1042 transitions. [2023-11-06 23:08:26,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:26,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1042 transitions. [2023-11-06 23:08:26,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 347.3333333333333) internal successors, (1042), 3 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:26,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:26,253 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:26,253 INFO L175 Difference]: Start difference. First operand has 92 places, 114 transitions, 598 flow. Second operand 3 states and 1042 transitions. [2023-11-06 23:08:26,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 112 transitions, 818 flow [2023-11-06 23:08:26,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 112 transitions, 713 flow, removed 33 selfloop flow, removed 3 redundant places. [2023-11-06 23:08:26,263 INFO L231 Difference]: Finished difference. Result has 89 places, 112 transitions, 491 flow [2023-11-06 23:08:26,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=491, PETRI_PLACES=89, PETRI_TRANSITIONS=112} [2023-11-06 23:08:26,265 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 8 predicate places. [2023-11-06 23:08:26,265 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 112 transitions, 491 flow [2023-11-06 23:08:26,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 325.5) internal successors, (1302), 4 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:26,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:26,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:08:26,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:08:26,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:26,490 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:08:26,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:26,490 INFO L85 PathProgramCache]: Analyzing trace with hash 2046564423, now seen corresponding path program 1 times [2023-11-06 23:08:26,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:26,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841864123] [2023-11-06 23:08:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:26,491 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 [2023-11-06 23:08:26,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:26,494 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:08:26,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:08:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:26,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:08:26,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:26,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,714 INFO L322 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-06 23:08:26,715 INFO L351 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 24 treesize of output 15 [2023-11-06 23:08:26,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,762 INFO L351 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 15 treesize of output 1 [2023-11-06 23:08:26,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,827 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:08:26,827 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-06 23:08:26,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,864 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-06 23:08:26,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,923 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:08:26,924 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-06 23:08:26,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,960 INFO L351 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 15 treesize of output 1 [2023-11-06 23:08:26,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:27,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:27,013 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-11-06 23:08:27,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:27,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:27,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:27,098 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:08:27,099 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-06 23:08:27,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:27,147 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 23:08:27,206 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:08:27,207 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 23:08:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:27,265 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:27,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:27,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841864123] [2023-11-06 23:08:27,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841864123] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:27,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:27,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:08:27,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405220911] [2023-11-06 23:08:27,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:27,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:08:27,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:27,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:08:27,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:08:27,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 754 [2023-11-06 23:08:27,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 112 transitions, 491 flow. Second operand has 4 states, 4 states have (on average 325.5) internal successors, (1302), 4 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:27,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:27,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 754 [2023-11-06 23:08:27,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:30,527 INFO L124 PetriNetUnfolderBase]: 10366/14177 cut-off events. [2023-11-06 23:08:30,527 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2023-11-06 23:08:30,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28713 conditions, 14177 events. 10366/14177 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 71920 event pairs, 7933 based on Foata normal form. 0/5505 useless extension candidates. Maximal degree in co-relation 28691. Up to 14177 conditions per place. [2023-11-06 23:08:30,663 INFO L140 encePairwiseOnDemand]: 751/754 looper letters, 109 selfloop transitions, 1 changer transitions 0/110 dead transitions. [2023-11-06 23:08:30,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 110 transitions, 707 flow [2023-11-06 23:08:30,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:30,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:30,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1040 transitions. [2023-11-06 23:08:30,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45977011494252873 [2023-11-06 23:08:30,670 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1040 transitions. [2023-11-06 23:08:30,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1040 transitions. [2023-11-06 23:08:30,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:30,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1040 transitions. [2023-11-06 23:08:30,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 346.6666666666667) internal successors, (1040), 3 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:30,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:30,685 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:30,685 INFO L175 Difference]: Start difference. First operand has 89 places, 112 transitions, 491 flow. Second operand 3 states and 1040 transitions. [2023-11-06 23:08:30,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 110 transitions, 707 flow [2023-11-06 23:08:30,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 110 transitions, 706 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:30,694 INFO L231 Difference]: Finished difference. Result has 88 places, 110 transitions, 488 flow [2023-11-06 23:08:30,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=488, PETRI_PLACES=88, PETRI_TRANSITIONS=110} [2023-11-06 23:08:30,696 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 7 predicate places. [2023-11-06 23:08:30,696 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 110 transitions, 488 flow [2023-11-06 23:08:30,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 325.5) internal successors, (1302), 4 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:30,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:30,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:30,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:30,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:30,912 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:08:30,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:30,913 INFO L85 PathProgramCache]: Analyzing trace with hash -981012714, now seen corresponding path program 1 times [2023-11-06 23:08:30,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:30,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61619779] [2023-11-06 23:08:30,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:30,914 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 [2023-11-06 23:08:30,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:30,915 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:08:30,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:08:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:31,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:08:31,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:31,106 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:31,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:31,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61619779] [2023-11-06 23:08:31,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61619779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:31,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:31,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:08:31,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340187043] [2023-11-06 23:08:31,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:31,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:31,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:31,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:31,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:31,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 754 [2023-11-06 23:08:31,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 110 transitions, 488 flow. Second operand has 5 states, 5 states have (on average 310.4) internal successors, (1552), 5 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:31,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:31,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 754 [2023-11-06 23:08:31,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:35,435 INFO L124 PetriNetUnfolderBase]: 12864/17680 cut-off events. [2023-11-06 23:08:35,436 INFO L125 PetriNetUnfolderBase]: For 287/287 co-relation queries the response was YES. [2023-11-06 23:08:35,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35842 conditions, 17680 events. 12864/17680 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 94046 event pairs, 9170 based on Foata normal form. 0/7210 useless extension candidates. Maximal degree in co-relation 35819. Up to 14176 conditions per place. [2023-11-06 23:08:35,581 INFO L140 encePairwiseOnDemand]: 744/754 looper letters, 209 selfloop transitions, 5 changer transitions 0/214 dead transitions. [2023-11-06 23:08:35,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 214 transitions, 1275 flow [2023-11-06 23:08:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:08:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:08:35,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1698 transitions. [2023-11-06 23:08:35,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45039787798408487 [2023-11-06 23:08:35,589 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1698 transitions. [2023-11-06 23:08:35,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1698 transitions. [2023-11-06 23:08:35,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:35,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1698 transitions. [2023-11-06 23:08:35,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 339.6) internal successors, (1698), 5 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:35,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 754.0) internal successors, (4524), 6 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:35,606 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 754.0) internal successors, (4524), 6 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:35,607 INFO L175 Difference]: Start difference. First operand has 88 places, 110 transitions, 488 flow. Second operand 5 states and 1698 transitions. [2023-11-06 23:08:35,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 214 transitions, 1275 flow [2023-11-06 23:08:35,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 214 transitions, 1274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:35,617 INFO L231 Difference]: Finished difference. Result has 93 places, 112 transitions, 520 flow [2023-11-06 23:08:35,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=520, PETRI_PLACES=93, PETRI_TRANSITIONS=112} [2023-11-06 23:08:35,619 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 12 predicate places. [2023-11-06 23:08:35,619 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 112 transitions, 520 flow [2023-11-06 23:08:35,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 310.4) internal successors, (1552), 5 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:35,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:35,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:35,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:08:35,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:35,843 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:08:35,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:35,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1461458448, now seen corresponding path program 1 times [2023-11-06 23:08:35,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:35,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158004594] [2023-11-06 23:08:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:35,844 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 [2023-11-06 23:08:35,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:35,846 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:08:35,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:08:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:36,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:08:36,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:36,077 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:36,077 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:36,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158004594] [2023-11-06 23:08:36,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158004594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:36,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:36,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:08:36,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520739883] [2023-11-06 23:08:36,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:36,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:36,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:36,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:36,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:36,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 754 [2023-11-06 23:08:36,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 112 transitions, 520 flow. Second operand has 5 states, 5 states have (on average 310.6) internal successors, (1553), 5 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:36,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:36,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 754 [2023-11-06 23:08:36,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:41,384 INFO L124 PetriNetUnfolderBase]: 17846/24656 cut-off events. [2023-11-06 23:08:41,385 INFO L125 PetriNetUnfolderBase]: For 3523/3523 co-relation queries the response was YES. [2023-11-06 23:08:41,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54293 conditions, 24656 events. 17846/24656 cut-off events. For 3523/3523 co-relation queries the response was YES. Maximal size of possible extension queue 1112. Compared 138758 event pairs, 12202 based on Foata normal form. 0/11606 useless extension candidates. Maximal degree in co-relation 54267. Up to 17668 conditions per place. [2023-11-06 23:08:41,586 INFO L140 encePairwiseOnDemand]: 744/754 looper letters, 186 selfloop transitions, 17 changer transitions 0/203 dead transitions. [2023-11-06 23:08:41,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 203 transitions, 1200 flow [2023-11-06 23:08:41,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:08:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:08:41,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1695 transitions. [2023-11-06 23:08:41,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496021220159151 [2023-11-06 23:08:41,594 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1695 transitions. [2023-11-06 23:08:41,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1695 transitions. [2023-11-06 23:08:41,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:41,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1695 transitions. [2023-11-06 23:08:41,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:41,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 754.0) internal successors, (4524), 6 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:41,610 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 754.0) internal successors, (4524), 6 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:41,610 INFO L175 Difference]: Start difference. First operand has 93 places, 112 transitions, 520 flow. Second operand 5 states and 1695 transitions. [2023-11-06 23:08:41,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 203 transitions, 1200 flow [2023-11-06 23:08:41,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 203 transitions, 1194 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:41,627 INFO L231 Difference]: Finished difference. Result has 98 places, 116 transitions, 595 flow [2023-11-06 23:08:41,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=595, PETRI_PLACES=98, PETRI_TRANSITIONS=116} [2023-11-06 23:08:41,629 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 17 predicate places. [2023-11-06 23:08:41,629 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 116 transitions, 595 flow [2023-11-06 23:08:41,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 310.6) internal successors, (1553), 5 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:41,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:41,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:41,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:08:41,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:41,844 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:08:41,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:41,845 INFO L85 PathProgramCache]: Analyzing trace with hash -346579601, now seen corresponding path program 1 times [2023-11-06 23:08:41,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:41,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118392962] [2023-11-06 23:08:41,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:41,846 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 [2023-11-06 23:08:41,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:41,848 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:08:41,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:08:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:42,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:08:42,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:42,059 INFO L322 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-06 23:08:42,059 INFO L351 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 19 treesize of output 15 [2023-11-06 23:08:42,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,106 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:08:42,108 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-06 23:08:42,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,122 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:08:42,122 INFO L351 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 21 treesize of output 1 [2023-11-06 23:08:42,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,148 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:08:42,148 INFO L351 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 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 23:08:42,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,166 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:08:42,166 INFO L351 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 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 23:08:42,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,208 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:08:42,209 INFO L351 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 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-06 23:08:42,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,273 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:08:42,274 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-06 23:08:42,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,312 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:08:42,312 INFO L351 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 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-06 23:08:42,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,353 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:08:42,353 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-06 23:08:42,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,371 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:08:42,371 INFO L351 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 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 23:08:42,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,416 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:08:42,417 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-06 23:08:42,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,431 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:08:42,431 INFO L351 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 21 treesize of output 1 [2023-11-06 23:08:42,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,460 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 23:08:42,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:42,503 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 23:08:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:42,652 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:42,653 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:42,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118392962] [2023-11-06 23:08:42,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118392962] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:42,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:42,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:08:42,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068140800] [2023-11-06 23:08:42,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:42,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:42,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:42,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:42,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:44,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 754 [2023-11-06 23:08:44,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 116 transitions, 595 flow. Second operand has 5 states, 5 states have (on average 319.6) internal successors, (1598), 5 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:44,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:44,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 754 [2023-11-06 23:08:44,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:47,492 INFO L124 PetriNetUnfolderBase]: 17096/23556 cut-off events. [2023-11-06 23:08:47,492 INFO L125 PetriNetUnfolderBase]: For 12451/12451 co-relation queries the response was YES. [2023-11-06 23:08:47,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55949 conditions, 23556 events. 17096/23556 cut-off events. For 12451/12451 co-relation queries the response was YES. Maximal size of possible extension queue 1106. Compared 129864 event pairs, 12729 based on Foata normal form. 0/11273 useless extension candidates. Maximal degree in co-relation 55921. Up to 23556 conditions per place. [2023-11-06 23:08:47,696 INFO L140 encePairwiseOnDemand]: 751/754 looper letters, 113 selfloop transitions, 1 changer transitions 0/114 dead transitions. [2023-11-06 23:08:47,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 114 transitions, 819 flow [2023-11-06 23:08:47,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:47,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:47,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1020 transitions. [2023-11-06 23:08:47,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4509283819628647 [2023-11-06 23:08:47,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1020 transitions. [2023-11-06 23:08:47,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1020 transitions. [2023-11-06 23:08:47,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:47,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1020 transitions. [2023-11-06 23:08:47,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:47,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:47,707 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:47,708 INFO L175 Difference]: Start difference. First operand has 98 places, 116 transitions, 595 flow. Second operand 3 states and 1020 transitions. [2023-11-06 23:08:47,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 114 transitions, 819 flow [2023-11-06 23:08:47,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 114 transitions, 803 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:47,725 INFO L231 Difference]: Finished difference. Result has 97 places, 114 transitions, 577 flow [2023-11-06 23:08:47,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=577, PETRI_PLACES=97, PETRI_TRANSITIONS=114} [2023-11-06 23:08:47,727 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 16 predicate places. [2023-11-06 23:08:47,727 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 114 transitions, 577 flow [2023-11-06 23:08:47,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 319.6) internal successors, (1598), 5 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:47,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:47,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:47,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-06 23:08:47,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:47,940 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:08:47,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:47,941 INFO L85 PathProgramCache]: Analyzing trace with hash -346579600, now seen corresponding path program 1 times [2023-11-06 23:08:47,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:47,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675115200] [2023-11-06 23:08:47,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:47,942 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 [2023-11-06 23:08:47,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:47,943 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:08:47,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:08:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:48,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:08:48,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:48,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:48,172 INFO L351 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 [2023-11-06 23:08:48,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:48,186 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:08:48,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:48,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:48,201 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:08:48,208 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:08:48,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:48,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:48,243 INFO L351 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 [2023-11-06 23:08:48,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:48,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:48,257 INFO L351 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 [2023-11-06 23:08:48,262 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:08:48,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:48,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:48,287 INFO L351 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 [2023-11-06 23:08:48,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:48,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:48,303 INFO L351 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 [2023-11-06 23:08:48,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:48,314 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:08:48,319 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:08:48,324 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:08:48,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:48,358 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 23:08:48,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:48,398 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 23:08:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:48,501 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:48,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:48,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675115200] [2023-11-06 23:08:48,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675115200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:48,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:48,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:08:48,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481167917] [2023-11-06 23:08:48,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:48,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:48,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:48,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:48,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:49,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 754 [2023-11-06 23:08:49,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 114 transitions, 577 flow. Second operand has 5 states, 5 states have (on average 323.6) internal successors, (1618), 5 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:49,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:49,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 754 [2023-11-06 23:08:49,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:52,949 INFO L124 PetriNetUnfolderBase]: 16346/22456 cut-off events. [2023-11-06 23:08:52,949 INFO L125 PetriNetUnfolderBase]: For 11711/11711 co-relation queries the response was YES. [2023-11-06 23:08:53,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53268 conditions, 22456 events. 16346/22456 cut-off events. For 11711/11711 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 120824 event pairs, 12140 based on Foata normal form. 0/10940 useless extension candidates. Maximal degree in co-relation 53239. Up to 22456 conditions per place. [2023-11-06 23:08:53,160 INFO L140 encePairwiseOnDemand]: 751/754 looper letters, 111 selfloop transitions, 1 changer transitions 0/112 dead transitions. [2023-11-06 23:08:53,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 112 transitions, 797 flow [2023-11-06 23:08:53,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:53,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1030 transitions. [2023-11-06 23:08:53,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45534924845269675 [2023-11-06 23:08:53,165 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1030 transitions. [2023-11-06 23:08:53,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1030 transitions. [2023-11-06 23:08:53,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:53,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1030 transitions. [2023-11-06 23:08:53,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.3333333333333) internal successors, (1030), 3 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:53,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:53,174 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:53,174 INFO L175 Difference]: Start difference. First operand has 97 places, 114 transitions, 577 flow. Second operand 3 states and 1030 transitions. [2023-11-06 23:08:53,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 112 transitions, 797 flow [2023-11-06 23:08:53,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 112 transitions, 796 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:53,197 INFO L231 Difference]: Finished difference. Result has 96 places, 112 transitions, 574 flow [2023-11-06 23:08:53,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=574, PETRI_PLACES=96, PETRI_TRANSITIONS=112} [2023-11-06 23:08:53,198 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 15 predicate places. [2023-11-06 23:08:53,199 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 112 transitions, 574 flow [2023-11-06 23:08:53,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 323.6) internal successors, (1618), 5 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:53,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:53,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:53,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:08:53,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:53,414 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:08:53,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:53,415 INFO L85 PathProgramCache]: Analyzing trace with hash 2140932533, now seen corresponding path program 1 times [2023-11-06 23:08:53,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:53,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137206065] [2023-11-06 23:08:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:53,415 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 [2023-11-06 23:08:53,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:53,416 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:08:53,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:08:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:53,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:08:53,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:53,649 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:53,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:53,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137206065] [2023-11-06 23:08:53,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137206065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:53,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:53,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:08:53,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834088117] [2023-11-06 23:08:53,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:53,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:53,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:53,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:53,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:54,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 754 [2023-11-06 23:08:54,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 112 transitions, 574 flow. Second operand has 5 states, 5 states have (on average 310.8) internal successors, (1554), 5 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:54,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:54,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 754 [2023-11-06 23:08:54,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:57,342 INFO L124 PetriNetUnfolderBase]: 12732/17478 cut-off events. [2023-11-06 23:08:57,342 INFO L125 PetriNetUnfolderBase]: For 5959/5959 co-relation queries the response was YES. [2023-11-06 23:08:57,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40783 conditions, 17478 events. 12732/17478 cut-off events. For 5959/5959 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 90819 event pairs, 9236 based on Foata normal form. 0/8258 useless extension candidates. Maximal degree in co-relation 40753. Up to 16056 conditions per place. [2023-11-06 23:08:57,496 INFO L140 encePairwiseOnDemand]: 744/754 looper letters, 154 selfloop transitions, 15 changer transitions 0/169 dead transitions. [2023-11-06 23:08:57,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 169 transitions, 1134 flow [2023-11-06 23:08:57,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:08:57,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:08:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1659 transitions. [2023-11-06 23:08:57,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440053050397878 [2023-11-06 23:08:57,502 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1659 transitions. [2023-11-06 23:08:57,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1659 transitions. [2023-11-06 23:08:57,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:57,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1659 transitions. [2023-11-06 23:08:57,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 331.8) internal successors, (1659), 5 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:57,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 754.0) internal successors, (4524), 6 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:57,514 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 754.0) internal successors, (4524), 6 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:57,515 INFO L175 Difference]: Start difference. First operand has 96 places, 112 transitions, 574 flow. Second operand 5 states and 1659 transitions. [2023-11-06 23:08:57,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 169 transitions, 1134 flow [2023-11-06 23:08:57,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 169 transitions, 1133 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:57,535 INFO L231 Difference]: Finished difference. Result has 101 places, 114 transitions, 626 flow [2023-11-06 23:08:57,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=626, PETRI_PLACES=101, PETRI_TRANSITIONS=114} [2023-11-06 23:08:57,536 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 20 predicate places. [2023-11-06 23:08:57,536 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 114 transitions, 626 flow [2023-11-06 23:08:57,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 310.8) internal successors, (1554), 5 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:57,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:57,537 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1] [2023-11-06 23:08:57,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:08:57,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:57,761 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:08:57,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:57,761 INFO L85 PathProgramCache]: Analyzing trace with hash -41135598, now seen corresponding path program 1 times [2023-11-06 23:08:57,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:57,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697220438] [2023-11-06 23:08:57,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:57,762 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 [2023-11-06 23:08:57,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:57,764 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 23:08:57,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2fb89c-f1c1-49d8-af42-d3335afb0245/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 23:08:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:57,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:08:57,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:57,942 INFO L351 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 [2023-11-06 23:08:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:58,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:59,845 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:59,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697220438] [2023-11-06 23:08:59,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697220438] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:59,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:08:59,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-06 23:08:59,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838862155] [2023-11-06 23:08:59,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:59,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 23:08:59,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:59,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 23:08:59,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:09:28,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 754 [2023-11-06 23:09:28,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 114 transitions, 626 flow. Second operand has 16 states, 16 states have (on average 301.0625) internal successors, (4817), 16 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:28,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:28,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 754 [2023-11-06 23:09:28,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:34,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:09:36,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:09:38,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:09:40,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:09:42,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:09:44,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []