./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:35:27,023 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:35:27,085 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 00:35:27,089 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:35:27,090 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:35:27,113 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:35:27,114 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:35:27,115 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:35:27,115 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:35:27,116 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:35:27,116 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:35:27,117 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:35:27,118 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:35:27,118 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:35:27,119 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:35:27,119 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:35:27,120 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:35:27,120 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:35:27,121 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:35:27,121 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:35:27,122 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:35:27,122 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:35:27,123 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:35:27,123 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:35:27,124 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:35:27,124 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:35:27,125 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:35:27,125 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:35:27,125 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:35:27,126 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:35:27,126 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:35:27,127 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:35:27,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:35:27,127 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:35:27,127 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:35:27,127 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:35:27,128 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:35:27,128 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:35:27,128 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:35:27,128 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:35:27,128 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:35:27,129 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_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a [2023-11-29 00:35:27,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:35:27,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:35:27,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:35:27,343 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:35:27,343 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:35:27,344 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2023-11-29 00:35:30,127 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:35:30,355 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:35:30,355 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2023-11-29 00:35:30,372 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/data/48258c3e5/3e1b4695be264be9a938308f4274849d/FLAGb2140be23 [2023-11-29 00:35:30,383 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/data/48258c3e5/3e1b4695be264be9a938308f4274849d [2023-11-29 00:35:30,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:35:30,387 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:35:30,388 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:35:30,389 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:35:30,394 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:35:30,394 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:35:30" (1/1) ... [2023-11-29 00:35:30,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6389103c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:30, skipping insertion in model container [2023-11-29 00:35:30,396 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:35:30" (1/1) ... [2023-11-29 00:35:30,447 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:35:30,805 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 00:35:30,805 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 00:35:30,806 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 00:35:30,807 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 00:35:30,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:35:30,855 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-29 00:35:30,855 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@66975e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:30, skipping insertion in model container [2023-11-29 00:35:30,855 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:35:30,856 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-29 00:35:30,858 INFO L158 Benchmark]: Toolchain (without parser) took 469.87ms. Allocated memory is still 182.5MB. Free memory was 144.4MB in the beginning and 128.7MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-29 00:35:30,858 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 111.1MB. Free memory was 59.2MB in the beginning and 59.1MB in the end (delta: 142.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 00:35:30,859 INFO L158 Benchmark]: CACSL2BoogieTranslator took 467.46ms. Allocated memory is still 182.5MB. Free memory was 143.9MB in the beginning and 128.7MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-29 00:35:30,861 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 111.1MB. Free memory was 59.2MB in the beginning and 59.1MB in the end (delta: 142.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 467.46ms. Allocated memory is still 182.5MB. Free memory was 143.9MB in the beginning and 128.7MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1045]: 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_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:35:32,575 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:35:32,654 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 00:35:32,660 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:35:32,661 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:35:32,690 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:35:32,691 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:35:32,691 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:35:32,692 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:35:32,692 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:35:32,693 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:35:32,694 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:35:32,695 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:35:32,695 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:35:32,696 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:35:32,697 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:35:32,697 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:35:32,698 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:35:32,698 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:35:32,699 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:35:32,700 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:35:32,700 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:35:32,701 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:35:32,701 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:35:32,702 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:35:32,702 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 00:35:32,702 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 00:35:32,703 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:35:32,703 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:35:32,704 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:35:32,704 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:35:32,705 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:35:32,705 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:35:32,705 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:35:32,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:35:32,706 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:35:32,706 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:35:32,706 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 00:35:32,707 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 00:35:32,707 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:35:32,707 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:35:32,707 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:35:32,708 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:35:32,708 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 00:35:32,708 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_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a [2023-11-29 00:35:32,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:35:33,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:35:33,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:35:33,012 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:35:33,012 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:35:33,013 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2023-11-29 00:35:35,787 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:35:36,021 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:35:36,022 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2023-11-29 00:35:36,040 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/data/d9179d8a6/8787ca97f3a146c59517bd7c600f198b/FLAGfb4e113e9 [2023-11-29 00:35:36,053 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/data/d9179d8a6/8787ca97f3a146c59517bd7c600f198b [2023-11-29 00:35:36,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:35:36,056 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:35:36,058 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:35:36,058 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:35:36,062 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:35:36,063 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:35:36" (1/1) ... [2023-11-29 00:35:36,064 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d51ec96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:36, skipping insertion in model container [2023-11-29 00:35:36,064 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:35:36" (1/1) ... [2023-11-29 00:35:36,124 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:35:36,539 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 00:35:36,539 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 00:35:36,540 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 00:35:36,540 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 00:35:36,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:35:36,589 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 00:35:36,598 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:35:36,623 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 00:35:36,623 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 00:35:36,624 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 00:35:36,624 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 00:35:36,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:35:36,643 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:35:36,674 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 00:35:36,674 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 00:35:36,675 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 00:35:36,675 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-29 00:35:36,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:35:36,756 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:35:36,757 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:36 WrapperNode [2023-11-29 00:35:36,757 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:35:36,758 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:35:36,758 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:35:36,758 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:35:36,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:36" (1/1) ... [2023-11-29 00:35:36,791 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:36" (1/1) ... [2023-11-29 00:35:36,820 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 161 [2023-11-29 00:35:36,820 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:35:36,821 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:35:36,821 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:35:36,822 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:35:36,830 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:36" (1/1) ... [2023-11-29 00:35:36,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:36" (1/1) ... [2023-11-29 00:35:36,836 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:36" (1/1) ... [2023-11-29 00:35:36,863 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [1, 1, 18]. 90 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0, 0]. The 14 writes are split as follows [1, 1, 12]. [2023-11-29 00:35:36,864 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:36" (1/1) ... [2023-11-29 00:35:36,864 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:36" (1/1) ... [2023-11-29 00:35:36,881 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:36" (1/1) ... [2023-11-29 00:35:36,884 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:36" (1/1) ... [2023-11-29 00:35:36,888 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:36" (1/1) ... [2023-11-29 00:35:36,891 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:36" (1/1) ... [2023-11-29 00:35:36,897 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:35:36,898 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:35:36,898 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:35:36,898 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:35:36,899 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:36" (1/1) ... [2023-11-29 00:35:36,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:35:36,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:35:36,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:35:36,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:35:36,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 00:35:36,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 00:35:36,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 00:35:36,964 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-29 00:35:36,964 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-29 00:35:36,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:35:36,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 00:35:36,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 00:35:36,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 00:35:36,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:35:36,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 00:35:36,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 00:35:36,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 00:35:36,965 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 00:35:36,966 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 00:35:36,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 00:35:36,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:35:36,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 00:35:36,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 00:35:36,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 00:35:36,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:35:36,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:35:36,969 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 00:35:37,144 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:35:37,146 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:35:37,747 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:35:37,974 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:35:37,974 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 00:35:37,975 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:35:37 BoogieIcfgContainer [2023-11-29 00:35:37,975 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:35:37,984 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:35:37,984 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:35:37,987 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:35:37,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:35:36" (1/3) ... [2023-11-29 00:35:37,988 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c88e48b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:35:37, skipping insertion in model container [2023-11-29 00:35:37,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:36" (2/3) ... [2023-11-29 00:35:37,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c88e48b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:35:37, skipping insertion in model container [2023-11-29 00:35:37,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:35:37" (3/3) ... [2023-11-29 00:35:37,990 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_24-evilcollapse_nr.i [2023-11-29 00:35:38,010 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:35:38,010 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2023-11-29 00:35:38,010 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:35:38,097 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 00:35:38,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 100 transitions, 208 flow [2023-11-29 00:35:38,178 INFO L124 PetriNetUnfolderBase]: 7/98 cut-off events. [2023-11-29 00:35:38,179 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:35:38,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 98 events. 7/98 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 319 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2023-11-29 00:35:38,183 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 100 transitions, 208 flow [2023-11-29 00:35:38,188 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 98 transitions, 202 flow [2023-11-29 00:35:38,198 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:35:38,205 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;@12ed6a75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:35:38,205 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2023-11-29 00:35:38,209 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:35:38,209 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 00:35:38,209 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:35:38,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:38,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:35:38,210 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:35:38,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:38,215 INFO L85 PathProgramCache]: Analyzing trace with hash 507116, now seen corresponding path program 1 times [2023-11-29 00:35:38,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:38,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552209330] [2023-11-29 00:35:38,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:38,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:38,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:38,250 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:35:38,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-29 00:35:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:38,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:35:38,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:38,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:38,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:38,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-29 00:35:38,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:38,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 00:35:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:38,556 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:38,557 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:38,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552209330] [2023-11-29 00:35:38,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552209330] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:38,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:38,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:35:38,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135130255] [2023-11-29 00:35:38,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:38,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:35:38,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:38,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:35:38,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:35:38,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 100 [2023-11-29 00:35:38,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 98 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:38,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:38,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 100 [2023-11-29 00:35:38,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:39,493 INFO L124 PetriNetUnfolderBase]: 544/1181 cut-off events. [2023-11-29 00:35:39,493 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-29 00:35:39,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2062 conditions, 1181 events. 544/1181 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6968 event pairs, 167 based on Foata normal form. 1/1021 useless extension candidates. Maximal degree in co-relation 1994. Up to 622 conditions per place. [2023-11-29 00:35:39,507 INFO L140 encePairwiseOnDemand]: 90/100 looper letters, 60 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2023-11-29 00:35:39,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 114 transitions, 362 flow [2023-11-29 00:35:39,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:35:39,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:35:39,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 278 transitions. [2023-11-29 00:35:39,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.695 [2023-11-29 00:35:39,520 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 278 transitions. [2023-11-29 00:35:39,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 278 transitions. [2023-11-29 00:35:39,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:39,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 278 transitions. [2023-11-29 00:35:39,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:39,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:39,532 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:39,534 INFO L175 Difference]: Start difference. First operand has 98 places, 98 transitions, 202 flow. Second operand 4 states and 278 transitions. [2023-11-29 00:35:39,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 114 transitions, 362 flow [2023-11-29 00:35:39,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 114 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:35:39,541 INFO L231 Difference]: Finished difference. Result has 96 places, 94 transitions, 208 flow [2023-11-29 00:35:39,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=96, PETRI_TRANSITIONS=94} [2023-11-29 00:35:39,545 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, -2 predicate places. [2023-11-29 00:35:39,546 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 94 transitions, 208 flow [2023-11-29 00:35:39,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:39,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:39,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:35:39,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:35:39,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:39,747 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:35:39,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:39,748 INFO L85 PathProgramCache]: Analyzing trace with hash 507117, now seen corresponding path program 1 times [2023-11-29 00:35:39,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:39,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693052056] [2023-11-29 00:35:39,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:39,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:39,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:39,750 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:35:39,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-29 00:35:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:39,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:35:39,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:39,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:39,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 00:35:39,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:39,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:39,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-29 00:35:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:39,967 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:39,967 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:39,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693052056] [2023-11-29 00:35:39,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693052056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:39,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:39,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:35:39,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584633146] [2023-11-29 00:35:39,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:39,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:35:39,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:39,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:35:39,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:35:40,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 100 [2023-11-29 00:35:40,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 94 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:40,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:40,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 100 [2023-11-29 00:35:40,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:40,827 INFO L124 PetriNetUnfolderBase]: 485/997 cut-off events. [2023-11-29 00:35:40,827 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2023-11-29 00:35:40,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1967 conditions, 997 events. 485/997 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5316 event pairs, 369 based on Foata normal form. 3/888 useless extension candidates. Maximal degree in co-relation 1881. Up to 762 conditions per place. [2023-11-29 00:35:40,836 INFO L140 encePairwiseOnDemand]: 92/100 looper letters, 43 selfloop transitions, 5 changer transitions 0/98 dead transitions. [2023-11-29 00:35:40,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 98 transitions, 318 flow [2023-11-29 00:35:40,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:35:40,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:35:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 275 transitions. [2023-11-29 00:35:40,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2023-11-29 00:35:40,840 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 275 transitions. [2023-11-29 00:35:40,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 275 transitions. [2023-11-29 00:35:40,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:40,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 275 transitions. [2023-11-29 00:35:40,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:40,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:40,845 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:40,845 INFO L175 Difference]: Start difference. First operand has 96 places, 94 transitions, 208 flow. Second operand 4 states and 275 transitions. [2023-11-29 00:35:40,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 98 transitions, 318 flow [2023-11-29 00:35:40,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 98 transitions, 306 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:35:40,850 INFO L231 Difference]: Finished difference. Result has 98 places, 98 transitions, 241 flow [2023-11-29 00:35:40,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=98, PETRI_TRANSITIONS=98} [2023-11-29 00:35:40,851 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 0 predicate places. [2023-11-29 00:35:40,852 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 98 transitions, 241 flow [2023-11-29 00:35:40,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:40,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:40,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 00:35:40,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-29 00:35:41,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:41,053 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:35:41,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:41,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2071915241, now seen corresponding path program 1 times [2023-11-29 00:35:41,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:41,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416928545] [2023-11-29 00:35:41,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:41,055 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:41,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:41,056 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:35:41,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-29 00:35:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:41,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:35:41,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:41,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:35:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:41,173 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:41,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:41,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416928545] [2023-11-29 00:35:41,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416928545] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:41,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:41,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:35:41,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403281901] [2023-11-29 00:35:41,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:41,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:35:41,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:41,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:35:41,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:35:41,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 100 [2023-11-29 00:35:41,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 98 transitions, 241 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:41,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:41,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 100 [2023-11-29 00:35:41,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:41,653 INFO L124 PetriNetUnfolderBase]: 485/1016 cut-off events. [2023-11-29 00:35:41,653 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-29 00:35:41,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 1016 events. 485/1016 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5479 event pairs, 369 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 1878. Up to 758 conditions per place. [2023-11-29 00:35:41,662 INFO L140 encePairwiseOnDemand]: 97/100 looper letters, 41 selfloop transitions, 3 changer transitions 0/97 dead transitions. [2023-11-29 00:35:41,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 97 transitions, 327 flow [2023-11-29 00:35:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:35:41,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:35:41,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2023-11-29 00:35:41,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7266666666666667 [2023-11-29 00:35:41,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 218 transitions. [2023-11-29 00:35:41,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 218 transitions. [2023-11-29 00:35:41,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:41,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 218 transitions. [2023-11-29 00:35:41,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:41,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:41,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:41,668 INFO L175 Difference]: Start difference. First operand has 98 places, 98 transitions, 241 flow. Second operand 3 states and 218 transitions. [2023-11-29 00:35:41,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 97 transitions, 327 flow [2023-11-29 00:35:41,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 97 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:35:41,672 INFO L231 Difference]: Finished difference. Result has 98 places, 97 transitions, 242 flow [2023-11-29 00:35:41,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=98, PETRI_TRANSITIONS=97} [2023-11-29 00:35:41,673 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 0 predicate places. [2023-11-29 00:35:41,673 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 97 transitions, 242 flow [2023-11-29 00:35:41,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:41,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:41,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 00:35:41,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-29 00:35:41,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:41,877 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:35:41,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:41,878 INFO L85 PathProgramCache]: Analyzing trace with hash -2071915240, now seen corresponding path program 1 times [2023-11-29 00:35:41,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:41,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545614551] [2023-11-29 00:35:41,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:41,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:41,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:41,879 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:35:41,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-29 00:35:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:41,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:35:41,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:42,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 00:35:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:42,017 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:42,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:42,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545614551] [2023-11-29 00:35:42,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545614551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:42,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:42,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:35:42,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592897562] [2023-11-29 00:35:42,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:42,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:35:42,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:42,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:35:42,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:35:42,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 100 [2023-11-29 00:35:42,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:42,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:42,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 100 [2023-11-29 00:35:42,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:42,577 INFO L124 PetriNetUnfolderBase]: 485/1015 cut-off events. [2023-11-29 00:35:42,577 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-29 00:35:42,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 1015 events. 485/1015 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5461 event pairs, 369 based on Foata normal form. 0/888 useless extension candidates. Maximal degree in co-relation 1877. Up to 758 conditions per place. [2023-11-29 00:35:42,585 INFO L140 encePairwiseOnDemand]: 97/100 looper letters, 41 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2023-11-29 00:35:42,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 96 transitions, 328 flow [2023-11-29 00:35:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:35:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:35:42,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2023-11-29 00:35:42,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7266666666666667 [2023-11-29 00:35:42,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 218 transitions. [2023-11-29 00:35:42,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 218 transitions. [2023-11-29 00:35:42,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:42,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 218 transitions. [2023-11-29 00:35:42,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:42,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:42,590 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:42,591 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 242 flow. Second operand 3 states and 218 transitions. [2023-11-29 00:35:42,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 96 transitions, 328 flow [2023-11-29 00:35:42,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 96 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:35:42,594 INFO L231 Difference]: Finished difference. Result has 97 places, 96 transitions, 240 flow [2023-11-29 00:35:42,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=97, PETRI_TRANSITIONS=96} [2023-11-29 00:35:42,595 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, -1 predicate places. [2023-11-29 00:35:42,596 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 96 transitions, 240 flow [2023-11-29 00:35:42,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:42,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:42,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:42,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-29 00:35:42,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:42,799 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:35:42,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:42,800 INFO L85 PathProgramCache]: Analyzing trace with hash 195137479, now seen corresponding path program 1 times [2023-11-29 00:35:42,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:42,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195746378] [2023-11-29 00:35:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:42,800 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:42,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:42,801 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:35:42,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-29 00:35:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:42,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:35:42,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:42,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 00:35:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:42,947 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:42,948 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:42,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195746378] [2023-11-29 00:35:42,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195746378] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:42,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:42,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:35:42,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323638322] [2023-11-29 00:35:42,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:42,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:35:42,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:42,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:35:42,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:35:43,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 100 [2023-11-29 00:35:43,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 96 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:43,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:43,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 100 [2023-11-29 00:35:43,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:43,686 INFO L124 PetriNetUnfolderBase]: 485/1013 cut-off events. [2023-11-29 00:35:43,687 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-29 00:35:43,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 1013 events. 485/1013 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5452 event pairs, 369 based on Foata normal form. 2/890 useless extension candidates. Maximal degree in co-relation 1875. Up to 760 conditions per place. [2023-11-29 00:35:43,692 INFO L140 encePairwiseOnDemand]: 95/100 looper letters, 42 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2023-11-29 00:35:43,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 94 transitions, 328 flow [2023-11-29 00:35:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:35:43,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:35:43,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 264 transitions. [2023-11-29 00:35:43,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2023-11-29 00:35:43,695 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 264 transitions. [2023-11-29 00:35:43,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 264 transitions. [2023-11-29 00:35:43,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:43,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 264 transitions. [2023-11-29 00:35:43,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:43,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:43,697 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:43,697 INFO L175 Difference]: Start difference. First operand has 97 places, 96 transitions, 240 flow. Second operand 4 states and 264 transitions. [2023-11-29 00:35:43,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 94 transitions, 328 flow [2023-11-29 00:35:43,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 94 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:35:43,700 INFO L231 Difference]: Finished difference. Result has 96 places, 94 transitions, 238 flow [2023-11-29 00:35:43,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=96, PETRI_TRANSITIONS=94} [2023-11-29 00:35:43,701 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, -2 predicate places. [2023-11-29 00:35:43,701 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 94 transitions, 238 flow [2023-11-29 00:35:43,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:43,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:43,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:43,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-29 00:35:43,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:43,905 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:35:43,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:43,906 INFO L85 PathProgramCache]: Analyzing trace with hash 195137478, now seen corresponding path program 1 times [2023-11-29 00:35:43,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:43,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296945222] [2023-11-29 00:35:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:43,907 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:43,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:43,908 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:35:43,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-29 00:35:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:44,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:35:44,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:44,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:35:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:44,027 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:44,027 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:44,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296945222] [2023-11-29 00:35:44,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296945222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:44,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:44,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:35:44,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394293136] [2023-11-29 00:35:44,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:44,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:35:44,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:44,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:35:44,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:35:44,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 100 [2023-11-29 00:35:44,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 94 transitions, 238 flow. Second operand has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:44,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:44,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 100 [2023-11-29 00:35:44,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:44,584 INFO L124 PetriNetUnfolderBase]: 485/1011 cut-off events. [2023-11-29 00:35:44,584 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-29 00:35:44,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 1011 events. 485/1011 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5437 event pairs, 369 based on Foata normal form. 1/888 useless extension candidates. Maximal degree in co-relation 1876. Up to 758 conditions per place. [2023-11-29 00:35:44,593 INFO L140 encePairwiseOnDemand]: 93/100 looper letters, 39 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2023-11-29 00:35:44,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 92 transitions, 326 flow [2023-11-29 00:35:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:35:44,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:35:44,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 309 transitions. [2023-11-29 00:35:44,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.618 [2023-11-29 00:35:44,596 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 309 transitions. [2023-11-29 00:35:44,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 309 transitions. [2023-11-29 00:35:44,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:44,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 309 transitions. [2023-11-29 00:35:44,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 61.8) internal successors, (309), 5 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:44,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 100.0) internal successors, (600), 6 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:44,599 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 100.0) internal successors, (600), 6 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:44,599 INFO L175 Difference]: Start difference. First operand has 96 places, 94 transitions, 238 flow. Second operand 5 states and 309 transitions. [2023-11-29 00:35:44,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 92 transitions, 326 flow [2023-11-29 00:35:44,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 92 transitions, 318 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:35:44,602 INFO L231 Difference]: Finished difference. Result has 95 places, 92 transitions, 240 flow [2023-11-29 00:35:44,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=95, PETRI_TRANSITIONS=92} [2023-11-29 00:35:44,603 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, -3 predicate places. [2023-11-29 00:35:44,604 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 92 transitions, 240 flow [2023-11-29 00:35:44,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:44,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:44,604 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-29 00:35:44,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-29 00:35:44,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:44,809 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:35:44,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:44,809 INFO L85 PathProgramCache]: Analyzing trace with hash 195139561, now seen corresponding path program 1 times [2023-11-29 00:35:44,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:44,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854369529] [2023-11-29 00:35:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:44,810 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:44,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:44,811 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:35:44,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-29 00:35:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:44,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:35:44,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:44,921 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:44,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:44,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854369529] [2023-11-29 00:35:44,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854369529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:44,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:44,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:35:44,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731918195] [2023-11-29 00:35:44,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:44,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:35:44,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:44,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:35:44,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:35:44,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 100 [2023-11-29 00:35:44,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 92 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:44,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:44,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 100 [2023-11-29 00:35:44,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:45,273 INFO L124 PetriNetUnfolderBase]: 484/1029 cut-off events. [2023-11-29 00:35:45,273 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-29 00:35:45,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1936 conditions, 1029 events. 484/1029 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5487 event pairs, 369 based on Foata normal form. 2/899 useless extension candidates. Maximal degree in co-relation 1903. Up to 758 conditions per place. [2023-11-29 00:35:45,281 INFO L140 encePairwiseOnDemand]: 97/100 looper letters, 45 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2023-11-29 00:35:45,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 96 transitions, 350 flow [2023-11-29 00:35:45,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:35:45,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:35:45,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-11-29 00:35:45,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7533333333333333 [2023-11-29 00:35:45,283 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-11-29 00:35:45,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-11-29 00:35:45,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:45,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-11-29 00:35:45,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:45,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:45,285 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:45,285 INFO L175 Difference]: Start difference. First operand has 95 places, 92 transitions, 240 flow. Second operand 3 states and 226 transitions. [2023-11-29 00:35:45,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 96 transitions, 350 flow [2023-11-29 00:35:45,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 96 transitions, 330 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 00:35:45,289 INFO L231 Difference]: Finished difference. Result has 94 places, 92 transitions, 237 flow [2023-11-29 00:35:45,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=237, PETRI_PLACES=94, PETRI_TRANSITIONS=92} [2023-11-29 00:35:45,289 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, -4 predicate places. [2023-11-29 00:35:45,290 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 92 transitions, 237 flow [2023-11-29 00:35:45,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:45,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:45,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:45,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-29 00:35:45,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:45,491 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:35:45,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:45,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1451431183, now seen corresponding path program 1 times [2023-11-29 00:35:45,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:45,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948623535] [2023-11-29 00:35:45,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:45,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:45,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:45,494 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:35:45,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-29 00:35:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:45,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:35:45,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:45,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:45,882 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 00:35:45,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 00:35:45,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 00:35:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:45,994 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:45,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:45,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948623535] [2023-11-29 00:35:45,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948623535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:45,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:45,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 00:35:45,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046795126] [2023-11-29 00:35:45,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:45,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:35:45,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:45,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:35:45,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:35:47,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 100 [2023-11-29 00:35:47,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 92 transitions, 237 flow. Second operand has 9 states, 9 states have (on average 48.0) internal successors, (432), 9 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:47,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:47,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 100 [2023-11-29 00:35:47,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:47,713 INFO L124 PetriNetUnfolderBase]: 545/1161 cut-off events. [2023-11-29 00:35:47,713 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-29 00:35:47,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2220 conditions, 1161 events. 545/1161 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6488 event pairs, 421 based on Foata normal form. 2/1011 useless extension candidates. Maximal degree in co-relation 2127. Up to 868 conditions per place. [2023-11-29 00:35:47,719 INFO L140 encePairwiseOnDemand]: 91/100 looper letters, 50 selfloop transitions, 9 changer transitions 0/101 dead transitions. [2023-11-29 00:35:47,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 101 transitions, 384 flow [2023-11-29 00:35:47,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:35:47,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:35:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 340 transitions. [2023-11-29 00:35:47,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2023-11-29 00:35:47,722 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 340 transitions. [2023-11-29 00:35:47,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 340 transitions. [2023-11-29 00:35:47,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:47,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 340 transitions. [2023-11-29 00:35:47,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.666666666666664) internal successors, (340), 6 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:47,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:47,726 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:47,726 INFO L175 Difference]: Start difference. First operand has 94 places, 92 transitions, 237 flow. Second operand 6 states and 340 transitions. [2023-11-29 00:35:47,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 101 transitions, 384 flow [2023-11-29 00:35:47,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 101 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:35:47,728 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 300 flow [2023-11-29 00:35:47,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=300, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2023-11-29 00:35:47,730 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 3 predicate places. [2023-11-29 00:35:47,730 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 300 flow [2023-11-29 00:35:47,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 48.0) internal successors, (432), 9 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:47,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:47,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:47,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-29 00:35:47,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:47,934 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:35:47,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:47,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1451431184, now seen corresponding path program 1 times [2023-11-29 00:35:47,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:47,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943573077] [2023-11-29 00:35:47,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:47,935 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:47,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:47,937 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:35:47,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-29 00:35:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:48,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:35:48,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:48,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:48,196 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 00:35:48,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 00:35:48,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:48,285 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:48,285 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:48,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943573077] [2023-11-29 00:35:48,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943573077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:48,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:48,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:35:48,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704033212] [2023-11-29 00:35:48,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:48,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:35:48,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:48,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:35:48,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:35:48,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 100 [2023-11-29 00:35:48,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 300 flow. Second operand has 7 states, 7 states have (on average 52.285714285714285) internal successors, (366), 7 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:48,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:48,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 100 [2023-11-29 00:35:48,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:49,570 INFO L124 PetriNetUnfolderBase]: 841/1812 cut-off events. [2023-11-29 00:35:49,570 INFO L125 PetriNetUnfolderBase]: For 106/113 co-relation queries the response was YES. [2023-11-29 00:35:49,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3385 conditions, 1812 events. 841/1812 cut-off events. For 106/113 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12076 event pairs, 229 based on Foata normal form. 48/1706 useless extension candidates. Maximal degree in co-relation 3292. Up to 762 conditions per place. [2023-11-29 00:35:49,581 INFO L140 encePairwiseOnDemand]: 87/100 looper letters, 57 selfloop transitions, 17 changer transitions 0/116 dead transitions. [2023-11-29 00:35:49,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 116 transitions, 486 flow [2023-11-29 00:35:49,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:35:49,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 00:35:49,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 426 transitions. [2023-11-29 00:35:49,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6085714285714285 [2023-11-29 00:35:49,584 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 426 transitions. [2023-11-29 00:35:49,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 426 transitions. [2023-11-29 00:35:49,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:49,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 426 transitions. [2023-11-29 00:35:49,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.857142857142854) internal successors, (426), 7 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:49,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 100.0) internal successors, (800), 8 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:49,588 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 100.0) internal successors, (800), 8 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:49,589 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 300 flow. Second operand 7 states and 426 transitions. [2023-11-29 00:35:49,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 116 transitions, 486 flow [2023-11-29 00:35:49,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 116 transitions, 482 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:35:49,593 INFO L231 Difference]: Finished difference. Result has 105 places, 97 transitions, 356 flow [2023-11-29 00:35:49,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=356, PETRI_PLACES=105, PETRI_TRANSITIONS=97} [2023-11-29 00:35:49,594 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 7 predicate places. [2023-11-29 00:35:49,595 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 97 transitions, 356 flow [2023-11-29 00:35:49,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 52.285714285714285) internal successors, (366), 7 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:49,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:49,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:49,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-29 00:35:49,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:49,796 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:35:49,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:49,796 INFO L85 PathProgramCache]: Analyzing trace with hash -2044693165, now seen corresponding path program 1 times [2023-11-29 00:35:49,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:49,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335260048] [2023-11-29 00:35:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:49,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:49,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:49,798 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:35:49,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-29 00:35:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:49,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 00:35:49,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:50,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:35:50,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2023-11-29 00:35:50,173 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 00:35:50,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 00:35:50,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-11-29 00:35:50,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-11-29 00:35:50,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-11-29 00:35:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:50,452 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:50,452 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:50,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335260048] [2023-11-29 00:35:50,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335260048] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:50,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:50,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 00:35:50,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001957083] [2023-11-29 00:35:50,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:50,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:35:50,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:50,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:35:50,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:35:52,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 100 [2023-11-29 00:35:52,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 97 transitions, 356 flow. Second operand has 10 states, 10 states have (on average 46.0) internal successors, (460), 10 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:52,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:52,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 100 [2023-11-29 00:35:52,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:53,489 INFO L124 PetriNetUnfolderBase]: 841/1863 cut-off events. [2023-11-29 00:35:53,489 INFO L125 PetriNetUnfolderBase]: For 541/561 co-relation queries the response was YES. [2023-11-29 00:35:53,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3815 conditions, 1863 events. 841/1863 cut-off events. For 541/561 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12495 event pairs, 605 based on Foata normal form. 0/1668 useless extension candidates. Maximal degree in co-relation 3693. Up to 1359 conditions per place. [2023-11-29 00:35:53,503 INFO L140 encePairwiseOnDemand]: 89/100 looper letters, 53 selfloop transitions, 15 changer transitions 0/106 dead transitions. [2023-11-29 00:35:53,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 106 transitions, 527 flow [2023-11-29 00:35:53,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:35:53,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 00:35:53,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 553 transitions. [2023-11-29 00:35:53,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027272727272727 [2023-11-29 00:35:53,506 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 553 transitions. [2023-11-29 00:35:53,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 553 transitions. [2023-11-29 00:35:53,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:53,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 553 transitions. [2023-11-29 00:35:53,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 50.27272727272727) internal successors, (553), 11 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:53,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:53,510 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:53,510 INFO L175 Difference]: Start difference. First operand has 105 places, 97 transitions, 356 flow. Second operand 11 states and 553 transitions. [2023-11-29 00:35:53,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 106 transitions, 527 flow [2023-11-29 00:35:53,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 106 transitions, 490 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 00:35:53,514 INFO L231 Difference]: Finished difference. Result has 115 places, 103 transitions, 407 flow [2023-11-29 00:35:53,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=407, PETRI_PLACES=115, PETRI_TRANSITIONS=103} [2023-11-29 00:35:53,515 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 17 predicate places. [2023-11-29 00:35:53,515 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 103 transitions, 407 flow [2023-11-29 00:35:53,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 46.0) internal successors, (460), 10 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:53,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:53,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:53,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-11-29 00:35:53,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:53,716 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:35:53,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:53,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2044693164, now seen corresponding path program 1 times [2023-11-29 00:35:53,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:53,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586753669] [2023-11-29 00:35:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:53,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:53,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:53,718 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:35:53,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-29 00:35:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:53,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 00:35:53,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:53,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:35:54,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:35:54,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 00:35:54,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 00:35:54,145 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 00:35:54,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 00:35:54,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 00:35:54,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-29 00:35:54,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-29 00:35:54,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-29 00:35:54,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-29 00:35:54,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-29 00:35:54,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-29 00:35:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:54,500 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:54,500 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:54,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586753669] [2023-11-29 00:35:54,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586753669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:54,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:54,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 00:35:54,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003731463] [2023-11-29 00:35:54,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:54,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:35:54,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:54,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:35:54,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:35:56,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 100 [2023-11-29 00:35:56,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 103 transitions, 407 flow. Second operand has 10 states, 10 states have (on average 44.0) internal successors, (440), 10 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:56,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:56,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 100 [2023-11-29 00:35:56,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:57,371 INFO L124 PetriNetUnfolderBase]: 841/1820 cut-off events. [2023-11-29 00:35:57,371 INFO L125 PetriNetUnfolderBase]: For 411/411 co-relation queries the response was YES. [2023-11-29 00:35:57,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3765 conditions, 1820 events. 841/1820 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12013 event pairs, 606 based on Foata normal form. 1/1624 useless extension candidates. Maximal degree in co-relation 3621. Up to 1364 conditions per place. [2023-11-29 00:35:57,383 INFO L140 encePairwiseOnDemand]: 88/100 looper letters, 70 selfloop transitions, 11 changer transitions 0/117 dead transitions. [2023-11-29 00:35:57,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 117 transitions, 616 flow [2023-11-29 00:35:57,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:35:57,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 00:35:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 547 transitions. [2023-11-29 00:35:57,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49727272727272726 [2023-11-29 00:35:57,387 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 547 transitions. [2023-11-29 00:35:57,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 547 transitions. [2023-11-29 00:35:57,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:57,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 547 transitions. [2023-11-29 00:35:57,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 49.72727272727273) internal successors, (547), 11 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:57,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:57,392 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:57,392 INFO L175 Difference]: Start difference. First operand has 115 places, 103 transitions, 407 flow. Second operand 11 states and 547 transitions. [2023-11-29 00:35:57,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 117 transitions, 616 flow [2023-11-29 00:35:57,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 117 transitions, 598 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 00:35:57,398 INFO L231 Difference]: Finished difference. Result has 124 places, 107 transitions, 450 flow [2023-11-29 00:35:57,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=450, PETRI_PLACES=124, PETRI_TRANSITIONS=107} [2023-11-29 00:35:57,399 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 26 predicate places. [2023-11-29 00:35:57,399 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 107 transitions, 450 flow [2023-11-29 00:35:57,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 44.0) internal successors, (440), 10 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:57,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:57,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:57,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-29 00:35:57,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:57,600 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:35:57,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:57,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1039021806, now seen corresponding path program 1 times [2023-11-29 00:35:57,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:57,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73614068] [2023-11-29 00:35:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:57,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:57,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:57,602 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:35:57,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-29 00:35:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:57,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:35:57,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:57,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 00:35:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:57,772 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:57,773 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:57,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73614068] [2023-11-29 00:35:57,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73614068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:57,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:57,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:35:57,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21458861] [2023-11-29 00:35:57,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:57,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:35:57,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:57,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:35:57,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:35:58,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 100 [2023-11-29 00:35:58,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 107 transitions, 450 flow. Second operand has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:58,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:58,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 100 [2023-11-29 00:35:58,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:58,440 INFO L124 PetriNetUnfolderBase]: 785/1710 cut-off events. [2023-11-29 00:35:58,441 INFO L125 PetriNetUnfolderBase]: For 391/403 co-relation queries the response was YES. [2023-11-29 00:35:58,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3494 conditions, 1710 events. 785/1710 cut-off events. For 391/403 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11086 event pairs, 558 based on Foata normal form. 8/1527 useless extension candidates. Maximal degree in co-relation 3368. Up to 1251 conditions per place. [2023-11-29 00:35:58,453 INFO L140 encePairwiseOnDemand]: 95/100 looper letters, 46 selfloop transitions, 12 changer transitions 0/105 dead transitions. [2023-11-29 00:35:58,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 105 transitions, 562 flow [2023-11-29 00:35:58,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:35:58,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:35:58,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 270 transitions. [2023-11-29 00:35:58,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2023-11-29 00:35:58,456 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 270 transitions. [2023-11-29 00:35:58,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 270 transitions. [2023-11-29 00:35:58,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:58,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 270 transitions. [2023-11-29 00:35:58,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:58,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:58,458 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:58,458 INFO L175 Difference]: Start difference. First operand has 124 places, 107 transitions, 450 flow. Second operand 4 states and 270 transitions. [2023-11-29 00:35:58,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 105 transitions, 562 flow [2023-11-29 00:35:58,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 105 transitions, 558 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:35:58,461 INFO L231 Difference]: Finished difference. Result has 123 places, 105 transitions, 466 flow [2023-11-29 00:35:58,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=466, PETRI_PLACES=123, PETRI_TRANSITIONS=105} [2023-11-29 00:35:58,462 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 25 predicate places. [2023-11-29 00:35:58,462 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 105 transitions, 466 flow [2023-11-29 00:35:58,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:58,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:58,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:58,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-29 00:35:58,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:58,663 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:35:58,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:58,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1039021805, now seen corresponding path program 1 times [2023-11-29 00:35:58,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:58,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310480896] [2023-11-29 00:35:58,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:58,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:58,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:58,665 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:35:58,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-29 00:35:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:58,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:35:58,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:58,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:35:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:58,806 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:58,806 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:58,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310480896] [2023-11-29 00:35:58,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310480896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:58,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:58,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:35:58,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702314675] [2023-11-29 00:35:58,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:58,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:35:58,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:58,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:35:58,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:35:58,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 100 [2023-11-29 00:35:58,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 105 transitions, 466 flow. Second operand has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:58,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:58,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 100 [2023-11-29 00:35:58,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:59,399 INFO L124 PetriNetUnfolderBase]: 785/1702 cut-off events. [2023-11-29 00:35:59,399 INFO L125 PetriNetUnfolderBase]: For 408/420 co-relation queries the response was YES. [2023-11-29 00:35:59,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3504 conditions, 1702 events. 785/1702 cut-off events. For 408/420 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11066 event pairs, 558 based on Foata normal form. 0/1519 useless extension candidates. Maximal degree in co-relation 3373. Up to 1251 conditions per place. [2023-11-29 00:35:59,410 INFO L140 encePairwiseOnDemand]: 95/100 looper letters, 48 selfloop transitions, 12 changer transitions 0/103 dead transitions. [2023-11-29 00:35:59,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 103 transitions, 582 flow [2023-11-29 00:35:59,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:35:59,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:35:59,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 264 transitions. [2023-11-29 00:35:59,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2023-11-29 00:35:59,413 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 264 transitions. [2023-11-29 00:35:59,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 264 transitions. [2023-11-29 00:35:59,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:59,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 264 transitions. [2023-11-29 00:35:59,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:59,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:59,416 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:59,416 INFO L175 Difference]: Start difference. First operand has 123 places, 105 transitions, 466 flow. Second operand 4 states and 264 transitions. [2023-11-29 00:35:59,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 103 transitions, 582 flow [2023-11-29 00:35:59,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 103 transitions, 558 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:35:59,422 INFO L231 Difference]: Finished difference. Result has 121 places, 103 transitions, 462 flow [2023-11-29 00:35:59,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=462, PETRI_PLACES=121, PETRI_TRANSITIONS=103} [2023-11-29 00:35:59,423 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 23 predicate places. [2023-11-29 00:35:59,424 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 103 transitions, 462 flow [2023-11-29 00:35:59,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:59,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:59,424 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:59,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-11-29 00:35:59,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:59,625 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:35:59,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:59,625 INFO L85 PathProgramCache]: Analyzing trace with hash 459649467, now seen corresponding path program 1 times [2023-11-29 00:35:59,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:59,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412228780] [2023-11-29 00:35:59,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:59,626 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:59,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:59,626 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:35:59,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-29 00:35:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:59,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:35:59,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:59,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:35:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:59,840 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:59,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412228780] [2023-11-29 00:35:59,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412228780] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:35:59,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:35:59,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-29 00:35:59,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960818268] [2023-11-29 00:35:59,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:35:59,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:35:59,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:59,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:35:59,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:35:59,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 100 [2023-11-29 00:35:59,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 103 transitions, 462 flow. Second operand has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:59,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:59,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 100 [2023-11-29 00:35:59,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:36:00,481 INFO L124 PetriNetUnfolderBase]: 785/1752 cut-off events. [2023-11-29 00:36:00,482 INFO L125 PetriNetUnfolderBase]: For 527/539 co-relation queries the response was YES. [2023-11-29 00:36:00,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3650 conditions, 1752 events. 785/1752 cut-off events. For 527/539 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11175 event pairs, 558 based on Foata normal form. 6/1571 useless extension candidates. Maximal degree in co-relation 3444. Up to 1247 conditions per place. [2023-11-29 00:36:00,492 INFO L140 encePairwiseOnDemand]: 96/100 looper letters, 64 selfloop transitions, 12 changer transitions 0/121 dead transitions. [2023-11-29 00:36:00,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 121 transitions, 772 flow [2023-11-29 00:36:00,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:36:00,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:36:00,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 419 transitions. [2023-11-29 00:36:00,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6983333333333334 [2023-11-29 00:36:00,495 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 419 transitions. [2023-11-29 00:36:00,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 419 transitions. [2023-11-29 00:36:00,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:36:00,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 419 transitions. [2023-11-29 00:36:00,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 69.83333333333333) internal successors, (419), 6 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:00,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:00,499 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:00,499 INFO L175 Difference]: Start difference. First operand has 121 places, 103 transitions, 462 flow. Second operand 6 states and 419 transitions. [2023-11-29 00:36:00,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 121 transitions, 772 flow [2023-11-29 00:36:00,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 121 transitions, 720 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:36:00,505 INFO L231 Difference]: Finished difference. Result has 127 places, 109 transitions, 548 flow [2023-11-29 00:36:00,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=548, PETRI_PLACES=127, PETRI_TRANSITIONS=109} [2023-11-29 00:36:00,505 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 29 predicate places. [2023-11-29 00:36:00,506 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 109 transitions, 548 flow [2023-11-29 00:36:00,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:00,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:36:00,506 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:36:00,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-11-29 00:36:00,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:36:00,707 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:36:00,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:00,707 INFO L85 PathProgramCache]: Analyzing trace with hash 999895618, now seen corresponding path program 1 times [2023-11-29 00:36:00,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:36:00,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957508304] [2023-11-29 00:36:00,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:00,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:36:00,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:36:00,708 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:36:00,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-29 00:36:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:36:01,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 00:36:01,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:01,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 00:36:01,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 00:36:01,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:36:01,329 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 00:36:01,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 00:36:01,355 INFO L349 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2023-11-29 00:36:01,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2023-11-29 00:36:01,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-29 00:36:01,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-29 00:36:01,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-29 00:36:01,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-29 00:36:01,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 00:36:01,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-29 00:36:01,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-29 00:36:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:36:01,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:36:01,821 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_690 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_689 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_690) |c_~#c~0.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_689) |c_~#c~0.base|) .cse0)))) (forall ((v_ArrVal_690 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_690) |c_~#c~0.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2023-11-29 00:36:01,890 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_690 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_689 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_690) |c_~#c~0.base|) .cse0) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_689) |c_~#c~0.base|) .cse0)))) (forall ((v_ArrVal_690 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_690) |c_~#c~0.base|) .cse0))) (bvule (bvadd .cse1 (_ bv4 32)) (bvadd .cse1 (_ bv8 32))))))) is different from false [2023-11-29 00:36:02,159 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:36:02,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 109 [2023-11-29 00:36:02,174 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:36:02,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 85 [2023-11-29 00:36:02,215 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:36:02,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 121 [2023-11-29 00:36:02,274 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:36:02,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 163 [2023-11-29 00:36:02,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 85 [2023-11-29 00:36:02,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 79 [2023-11-29 00:36:02,361 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:36:02,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 112 [2023-11-29 00:36:02,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 63 [2023-11-29 00:36:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-11-29 00:36:04,489 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:36:04,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957508304] [2023-11-29 00:36:04,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957508304] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:36:04,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:36:04,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-11-29 00:36:04,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810126851] [2023-11-29 00:36:04,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:36:04,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:36:04,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:36:04,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:36:04,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=175, Unknown=2, NotChecked=54, Total=272 [2023-11-29 00:36:06,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 100 [2023-11-29 00:36:06,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 109 transitions, 548 flow. Second operand has 17 states, 17 states have (on average 8.235294117647058) internal successors, (140), 17 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:06,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:36:06,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 100 [2023-11-29 00:36:06,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:36:10,258 INFO L124 PetriNetUnfolderBase]: 4047/6534 cut-off events. [2023-11-29 00:36:10,258 INFO L125 PetriNetUnfolderBase]: For 1260/1260 co-relation queries the response was YES. [2023-11-29 00:36:10,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14598 conditions, 6534 events. 4047/6534 cut-off events. For 1260/1260 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 40144 event pairs, 3438 based on Foata normal form. 6/4004 useless extension candidates. Maximal degree in co-relation 14360. Up to 6371 conditions per place. [2023-11-29 00:36:10,285 INFO L140 encePairwiseOnDemand]: 90/100 looper letters, 84 selfloop transitions, 26 changer transitions 0/114 dead transitions. [2023-11-29 00:36:10,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 114 transitions, 782 flow [2023-11-29 00:36:10,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:36:10,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 00:36:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 162 transitions. [2023-11-29 00:36:10,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.135 [2023-11-29 00:36:10,288 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 162 transitions. [2023-11-29 00:36:10,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 162 transitions. [2023-11-29 00:36:10,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:36:10,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 162 transitions. [2023-11-29 00:36:10,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:10,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 100.0) internal successors, (1300), 13 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:10,290 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 100.0) internal successors, (1300), 13 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:10,290 INFO L175 Difference]: Start difference. First operand has 127 places, 109 transitions, 548 flow. Second operand 12 states and 162 transitions. [2023-11-29 00:36:10,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 114 transitions, 782 flow [2023-11-29 00:36:10,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 114 transitions, 764 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-11-29 00:36:10,295 INFO L231 Difference]: Finished difference. Result has 138 places, 110 transitions, 590 flow [2023-11-29 00:36:10,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=590, PETRI_PLACES=138, PETRI_TRANSITIONS=110} [2023-11-29 00:36:10,295 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 40 predicate places. [2023-11-29 00:36:10,295 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 110 transitions, 590 flow [2023-11-29 00:36:10,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.235294117647058) internal successors, (140), 17 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:10,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:36:10,296 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:36:10,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-11-29 00:36:10,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:36:10,496 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:36:10,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:10,497 INFO L85 PathProgramCache]: Analyzing trace with hash 999895617, now seen corresponding path program 1 times [2023-11-29 00:36:10,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:36:10,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068195219] [2023-11-29 00:36:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:10,497 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:36:10,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:36:10,498 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:36:10,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-29 00:36:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:36:10,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 00:36:10,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:10,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:36:11,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:36:11,171 INFO L349 Elim1Store]: treesize reduction 86, result has 31.2 percent of original size [2023-11-29 00:36:11,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 59 [2023-11-29 00:36:11,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2023-11-29 00:36:11,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2023-11-29 00:36:11,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2023-11-29 00:36:11,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 00:36:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:36:11,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:36:11,856 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:36:11,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-11-29 00:36:11,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:36:11,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 55 [2023-11-29 00:36:11,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2023-11-29 00:36:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:36:12,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:36:12,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068195219] [2023-11-29 00:36:12,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068195219] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:36:12,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:36:12,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-11-29 00:36:12,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933168368] [2023-11-29 00:36:12,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:36:12,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:36:12,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:36:12,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:36:12,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=214, Unknown=9, NotChecked=0, Total=272 [2023-11-29 00:36:17,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:36:23,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 100 [2023-11-29 00:36:23,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 110 transitions, 590 flow. Second operand has 17 states, 17 states have (on average 18.235294117647058) internal successors, (310), 17 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:23,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:36:23,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 100 [2023-11-29 00:36:23,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:36:29,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:36:34,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:36:36,542 INFO L124 PetriNetUnfolderBase]: 2635/4852 cut-off events. [2023-11-29 00:36:36,542 INFO L125 PetriNetUnfolderBase]: For 1005/1005 co-relation queries the response was YES. [2023-11-29 00:36:36,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10302 conditions, 4852 events. 2635/4852 cut-off events. For 1005/1005 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 33510 event pairs, 1969 based on Foata normal form. 0/3539 useless extension candidates. Maximal degree in co-relation 10046. Up to 3776 conditions per place. [2023-11-29 00:36:36,563 INFO L140 encePairwiseOnDemand]: 89/100 looper letters, 106 selfloop transitions, 28 changer transitions 0/148 dead transitions. [2023-11-29 00:36:36,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 148 transitions, 954 flow [2023-11-29 00:36:36,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:36:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 00:36:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 320 transitions. [2023-11-29 00:36:36,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24615384615384617 [2023-11-29 00:36:36,566 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 320 transitions. [2023-11-29 00:36:36,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 320 transitions. [2023-11-29 00:36:36,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:36:36,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 320 transitions. [2023-11-29 00:36:36,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 24.615384615384617) internal successors, (320), 13 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:36,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 100.0) internal successors, (1400), 14 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:36,570 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 100.0) internal successors, (1400), 14 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:36,570 INFO L175 Difference]: Start difference. First operand has 138 places, 110 transitions, 590 flow. Second operand 13 states and 320 transitions. [2023-11-29 00:36:36,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 148 transitions, 954 flow [2023-11-29 00:36:36,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 148 transitions, 863 flow, removed 13 selfloop flow, removed 12 redundant places. [2023-11-29 00:36:36,579 INFO L231 Difference]: Finished difference. Result has 138 places, 111 transitions, 574 flow [2023-11-29 00:36:36,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=574, PETRI_PLACES=138, PETRI_TRANSITIONS=111} [2023-11-29 00:36:36,580 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 40 predicate places. [2023-11-29 00:36:36,580 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 111 transitions, 574 flow [2023-11-29 00:36:36,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 18.235294117647058) internal successors, (310), 17 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:36,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:36:36,581 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2023-11-29 00:36:36,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-11-29 00:36:36,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:36:36,781 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:36:36,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:36,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1016274839, now seen corresponding path program 2 times [2023-11-29 00:36:36,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:36:36,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877717333] [2023-11-29 00:36:36,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:36:36,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:36:36,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:36:36,783 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:36:36,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-29 00:36:37,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:36:37,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:36:37,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:36:37,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:36:37,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:36:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:36:37,570 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:36:37,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877717333] [2023-11-29 00:36:37,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877717333] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:36:37,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:36:37,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 00:36:37,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025377748] [2023-11-29 00:36:37,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:36:37,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:36:37,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:36:37,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:36:37,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:36:37,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 100 [2023-11-29 00:36:37,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 111 transitions, 574 flow. Second operand has 12 states, 12 states have (on average 63.916666666666664) internal successors, (767), 12 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:37,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:36:37,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 100 [2023-11-29 00:36:37,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:36:38,997 INFO L124 PetriNetUnfolderBase]: 785/1860 cut-off events. [2023-11-29 00:36:38,997 INFO L125 PetriNetUnfolderBase]: For 941/955 co-relation queries the response was YES. [2023-11-29 00:36:39,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4133 conditions, 1860 events. 785/1860 cut-off events. For 941/955 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11116 event pairs, 557 based on Foata normal form. 12/1692 useless extension candidates. Maximal degree in co-relation 3693. Up to 1247 conditions per place. [2023-11-29 00:36:39,008 INFO L140 encePairwiseOnDemand]: 96/100 looper letters, 100 selfloop transitions, 24 changer transitions 0/171 dead transitions. [2023-11-29 00:36:39,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 171 transitions, 1402 flow [2023-11-29 00:36:39,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:36:39,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 00:36:39,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 812 transitions. [2023-11-29 00:36:39,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6766666666666666 [2023-11-29 00:36:39,012 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 812 transitions. [2023-11-29 00:36:39,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 812 transitions. [2023-11-29 00:36:39,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:36:39,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 812 transitions. [2023-11-29 00:36:39,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 67.66666666666667) internal successors, (812), 12 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:39,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 100.0) internal successors, (1300), 13 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:39,017 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 100.0) internal successors, (1300), 13 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:39,017 INFO L175 Difference]: Start difference. First operand has 138 places, 111 transitions, 574 flow. Second operand 12 states and 812 transitions. [2023-11-29 00:36:39,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 171 transitions, 1402 flow [2023-11-29 00:36:39,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 171 transitions, 1239 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-11-29 00:36:39,026 INFO L231 Difference]: Finished difference. Result has 146 places, 125 transitions, 783 flow [2023-11-29 00:36:39,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=783, PETRI_PLACES=146, PETRI_TRANSITIONS=125} [2023-11-29 00:36:39,027 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 48 predicate places. [2023-11-29 00:36:39,027 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 125 transitions, 783 flow [2023-11-29 00:36:39,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 63.916666666666664) internal successors, (767), 12 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:39,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:36:39,028 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2023-11-29 00:36:39,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-11-29 00:36:39,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:36:39,230 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:36:39,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:39,231 INFO L85 PathProgramCache]: Analyzing trace with hash -942238423, now seen corresponding path program 3 times [2023-11-29 00:36:39,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:36:39,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685622345] [2023-11-29 00:36:39,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:36:39,232 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:36:39,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:36:39,232 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:36:39,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-29 00:36:51,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-11-29 00:36:51,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:36:51,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:36:51,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 2 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:36:51,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:36:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 2 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:36:51,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:36:51,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685622345] [2023-11-29 00:36:51,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685622345] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:36:51,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:36:51,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-11-29 00:36:51,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478149138] [2023-11-29 00:36:51,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:36:51,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 00:36:51,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:36:51,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 00:36:51,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:36:51,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 100 [2023-11-29 00:36:51,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 125 transitions, 783 flow. Second operand has 24 states, 24 states have (on average 64.45833333333333) internal successors, (1547), 24 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:51,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:36:51,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 100 [2023-11-29 00:36:51,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:36:55,872 INFO L124 PetriNetUnfolderBase]: 785/2100 cut-off events. [2023-11-29 00:36:55,872 INFO L125 PetriNetUnfolderBase]: For 2528/2542 co-relation queries the response was YES. [2023-11-29 00:36:55,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4934 conditions, 2100 events. 785/2100 cut-off events. For 2528/2542 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11164 event pairs, 557 based on Foata normal form. 24/1944 useless extension candidates. Maximal degree in co-relation 4085. Up to 1247 conditions per place. [2023-11-29 00:36:55,880 INFO L140 encePairwiseOnDemand]: 96/100 looper letters, 172 selfloop transitions, 48 changer transitions 0/267 dead transitions. [2023-11-29 00:36:55,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 267 transitions, 2531 flow [2023-11-29 00:36:55,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 00:36:55,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 00:36:55,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1598 transitions. [2023-11-29 00:36:55,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6658333333333334 [2023-11-29 00:36:55,883 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1598 transitions. [2023-11-29 00:36:55,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1598 transitions. [2023-11-29 00:36:55,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:36:55,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1598 transitions. [2023-11-29 00:36:55,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 66.58333333333333) internal successors, (1598), 24 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) [2023-11-29 00:36:55,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 100.0) internal successors, (2500), 25 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:55,890 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 100.0) internal successors, (2500), 25 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:55,890 INFO L175 Difference]: Start difference. First operand has 146 places, 125 transitions, 783 flow. Second operand 24 states and 1598 transitions. [2023-11-29 00:36:55,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 267 transitions, 2531 flow [2023-11-29 00:36:55,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 267 transitions, 2519 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:36:55,901 INFO L231 Difference]: Finished difference. Result has 179 places, 151 transitions, 1363 flow [2023-11-29 00:36:55,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1363, PETRI_PLACES=179, PETRI_TRANSITIONS=151} [2023-11-29 00:36:55,902 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 81 predicate places. [2023-11-29 00:36:55,902 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 151 transitions, 1363 flow [2023-11-29 00:36:55,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 64.45833333333333) internal successors, (1547), 24 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:55,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:36:55,903 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1] [2023-11-29 00:36:55,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-11-29 00:36:56,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:36:56,104 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:36:56,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:56,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1944637097, now seen corresponding path program 4 times [2023-11-29 00:36:56,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:36:56,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919222450] [2023-11-29 00:36:56,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:36:56,106 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:36:56,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:36:56,107 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:36:56,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-29 00:37:04,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:37:04,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:37:04,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 3022 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 00:37:04,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:37:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 2 proven. 2101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:37:05,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:37:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 2 proven. 2101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:37:06,793 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:37:06,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919222450] [2023-11-29 00:37:06,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919222450] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:37:06,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:37:06,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2023-11-29 00:37:06,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271882640] [2023-11-29 00:37:06,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:37:06,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-29 00:37:06,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:37:06,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-29 00:37:06,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=1754, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 00:37:06,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 100 [2023-11-29 00:37:06,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 151 transitions, 1363 flow. Second operand has 48 states, 48 states have (on average 64.72916666666667) internal successors, (3107), 48 states have internal predecessors, (3107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:06,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:37:06,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 100 [2023-11-29 00:37:06,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:37:15,445 INFO L124 PetriNetUnfolderBase]: 785/2260 cut-off events. [2023-11-29 00:37:15,446 INFO L125 PetriNetUnfolderBase]: For 6275/6289 co-relation queries the response was YES. [2023-11-29 00:37:15,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5697 conditions, 2260 events. 785/2260 cut-off events. For 6275/6289 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11177 event pairs, 557 based on Foata normal form. 16/2096 useless extension candidates. Maximal degree in co-relation 4456. Up to 1247 conditions per place. [2023-11-29 00:37:15,454 INFO L140 encePairwiseOnDemand]: 96/100 looper letters, 220 selfloop transitions, 64 changer transitions 0/331 dead transitions. [2023-11-29 00:37:15,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 331 transitions, 3671 flow [2023-11-29 00:37:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 00:37:15,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-29 00:37:15,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2114 transitions. [2023-11-29 00:37:15,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.660625 [2023-11-29 00:37:15,459 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2114 transitions. [2023-11-29 00:37:15,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2114 transitions. [2023-11-29 00:37:15,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:37:15,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2114 transitions. [2023-11-29 00:37:15,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 66.0625) internal successors, (2114), 32 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:15,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 100.0) internal successors, (3300), 33 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:15,471 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 100.0) internal successors, (3300), 33 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:15,471 INFO L175 Difference]: Start difference. First operand has 179 places, 151 transitions, 1363 flow. Second operand 32 states and 2114 transitions. [2023-11-29 00:37:15,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 331 transitions, 3671 flow [2023-11-29 00:37:15,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 331 transitions, 3635 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-11-29 00:37:15,505 INFO L231 Difference]: Finished difference. Result has 210 places, 169 transitions, 1871 flow [2023-11-29 00:37:15,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1871, PETRI_PLACES=210, PETRI_TRANSITIONS=169} [2023-11-29 00:37:15,506 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 112 predicate places. [2023-11-29 00:37:15,506 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 169 transitions, 1871 flow [2023-11-29 00:37:15,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 64.72916666666667) internal successors, (3107), 48 states have internal predecessors, (3107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:15,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:37:15,508 INFO L208 CegarLoopForPetriNet]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 2, 1, 1, 1, 1, 1] [2023-11-29 00:37:15,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-11-29 00:37:15,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:37:15,709 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 00:37:15,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:37:15,709 INFO L85 PathProgramCache]: Analyzing trace with hash -32743511, now seen corresponding path program 5 times [2023-11-29 00:37:15,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:37:15,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373659601] [2023-11-29 00:37:15,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:37:15,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:37:15,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:37:15,712 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:37:15,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165618b8-298f-4c50-8d07-2fc1186ce095/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process