./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c --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_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:26:17,832 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:26:17,901 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 00:26:17,906 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:26:17,907 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:26:17,933 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:26:17,933 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:26:17,934 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:26:17,935 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:26:17,935 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:26:17,936 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:26:17,936 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:26:17,937 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:26:17,938 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:26:17,938 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:26:17,939 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:26:17,939 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:26:17,940 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:26:17,940 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:26:17,941 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:26:17,941 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:26:17,942 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:26:17,943 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:26:17,943 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:26:17,943 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:26:17,944 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:26:17,944 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:26:17,945 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:26:17,945 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:26:17,946 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:26:17,946 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:26:17,946 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:26:17,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:26:17,947 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:26:17,947 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:26:17,947 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:26:17,948 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:26:17,948 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:26:17,948 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:26:17,948 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:26:17,949 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:26:17,949 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_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 [2023-11-29 00:26:18,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:26:18,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:26:18,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:26:18,175 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:26:18,176 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:26:18,177 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-11-29 00:26:20,965 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:26:21,137 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:26:21,138 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-11-29 00:26:21,146 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/data/656933131/77fb5d7b26d44f71b23bd2403e585596/FLAGa1ecdce01 [2023-11-29 00:26:21,161 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/data/656933131/77fb5d7b26d44f71b23bd2403e585596 [2023-11-29 00:26:21,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:26:21,166 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:26:21,167 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:26:21,167 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:26:21,173 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:26:21,173 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:26:21" (1/1) ... [2023-11-29 00:26:21,174 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44060d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:21, skipping insertion in model container [2023-11-29 00:26:21,175 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:26:21" (1/1) ... [2023-11-29 00:26:21,201 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:26:21,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:26:21,401 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 00:26:21,402 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@42d263c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:21, skipping insertion in model container [2023-11-29 00:26:21,402 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:26:21,403 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-29 00:26:21,405 INFO L158 Benchmark]: Toolchain (without parser) took 238.21ms. Allocated memory is still 155.2MB. Free memory was 108.8MB in the beginning and 98.8MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-29 00:26:21,405 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 155.2MB. Free memory is still 97.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 00:26:21,406 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.56ms. Allocated memory is still 155.2MB. Free memory was 108.4MB in the beginning and 98.8MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-29 00:26:21,408 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 155.2MB. Free memory is still 97.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 235.56ms. Allocated memory is still 155.2MB. Free memory was 108.4MB in the beginning and 98.8MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 100]: 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_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:26:23,111 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:26:23,179 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 00:26:23,190 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:26:23,191 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:26:23,218 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:26:23,219 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:26:23,219 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:26:23,220 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:26:23,220 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:26:23,221 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:26:23,222 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:26:23,222 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:26:23,223 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:26:23,223 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:26:23,224 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:26:23,224 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:26:23,225 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:26:23,225 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:26:23,226 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:26:23,226 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:26:23,227 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:26:23,227 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:26:23,228 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:26:23,228 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:26:23,229 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 00:26:23,229 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 00:26:23,229 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:26:23,230 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:26:23,230 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:26:23,231 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:26:23,231 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:26:23,231 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:26:23,232 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:26:23,232 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:26:23,232 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:26:23,233 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:26:23,233 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 00:26:23,233 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 00:26:23,233 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:26:23,233 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:26:23,234 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:26:23,234 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:26:23,234 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 00:26:23,234 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_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 [2023-11-29 00:26:23,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:26:23,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:26:23,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:26:23,553 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:26:23,554 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:26:23,555 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-11-29 00:26:26,370 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:26:26,583 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:26:26,584 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-11-29 00:26:26,592 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/data/209a09757/ef7b36d8d3e94b57b5e56fdf9b0f9797/FLAGb27ee2138 [2023-11-29 00:26:26,604 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/data/209a09757/ef7b36d8d3e94b57b5e56fdf9b0f9797 [2023-11-29 00:26:26,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:26:26,608 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:26:26,609 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:26:26,609 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:26:26,613 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:26:26,614 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:26:26" (1/1) ... [2023-11-29 00:26:26,615 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b9bba5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:26, skipping insertion in model container [2023-11-29 00:26:26,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:26:26" (1/1) ... [2023-11-29 00:26:26,637 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:26:26,798 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:26:26,814 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 00:26:26,819 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:26:26,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:26:26,845 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:26:26,870 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:26:26,887 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:26:26,887 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:26 WrapperNode [2023-11-29 00:26:26,888 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:26:26,889 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:26:26,889 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:26:26,889 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:26:26,894 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:26" (1/1) ... [2023-11-29 00:26:26,906 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:26" (1/1) ... [2023-11-29 00:26:26,941 INFO L138 Inliner]: procedures = 28, calls = 46, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 276 [2023-11-29 00:26:26,941 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:26:26,942 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:26:26,942 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:26:26,942 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:26:26,953 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:26" (1/1) ... [2023-11-29 00:26:26,953 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:26" (1/1) ... [2023-11-29 00:26:26,960 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:26" (1/1) ... [2023-11-29 00:26:26,983 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 2, 2, 2, 9]. 53 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 1, 1, 1, 4]. [2023-11-29 00:26:26,983 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:26" (1/1) ... [2023-11-29 00:26:26,983 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:26" (1/1) ... [2023-11-29 00:26:27,001 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:26" (1/1) ... [2023-11-29 00:26:27,006 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:26" (1/1) ... [2023-11-29 00:26:27,022 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:26" (1/1) ... [2023-11-29 00:26:27,025 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:26" (1/1) ... [2023-11-29 00:26:27,030 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:26:27,031 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:26:27,031 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:26:27,032 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:26:27,032 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:26" (1/1) ... [2023-11-29 00:26:27,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:26:27,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:27,092 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:26:27,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:26:27,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:26:27,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 00:26:27,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 00:26:27,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 00:26:27,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 00:26:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-29 00:26:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:26:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 00:26:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 00:26:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 00:26:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 00:26:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-29 00:26:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 00:26:27,136 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 00:26:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 00:26:27,136 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 00:26:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 00:26:27,137 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 00:26:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 00:26:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:26:27,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:26:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:26:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 00:26:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 00:26:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 00:26:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 00:26:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-29 00:26:27,140 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 00:26:27,270 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:26:27,272 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:26:28,003 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:26:28,464 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:26:28,464 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-29 00:26:28,464 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:26:28 BoogieIcfgContainer [2023-11-29 00:26:28,464 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:26:28,467 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:26:28,467 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:26:28,470 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:26:28,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:26:26" (1/3) ... [2023-11-29 00:26:28,471 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446e784a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:26:28, skipping insertion in model container [2023-11-29 00:26:28,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:26" (2/3) ... [2023-11-29 00:26:28,472 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446e784a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:26:28, skipping insertion in model container [2023-11-29 00:26:28,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:26:28" (3/3) ... [2023-11-29 00:26:28,473 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2023-11-29 00:26:28,492 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:26:28,492 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-11-29 00:26:28,492 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:26:28,585 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 00:26:28,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 80 transitions, 181 flow [2023-11-29 00:26:28,666 INFO L124 PetriNetUnfolderBase]: 6/77 cut-off events. [2023-11-29 00:26:28,667 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 00:26:28,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 77 events. 6/77 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 162 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-11-29 00:26:28,672 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 80 transitions, 181 flow [2023-11-29 00:26:28,677 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 76 transitions, 170 flow [2023-11-29 00:26:28,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:26:28,694 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;@6eee45ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:26:28,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-11-29 00:26:28,698 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:26:28,699 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-29 00:26:28,699 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:26:28,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:26:28,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:26:28,700 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:26:28,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:28,706 INFO L85 PathProgramCache]: Analyzing trace with hash 920708, now seen corresponding path program 1 times [2023-11-29 00:26:28,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:26:28,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937011946] [2023-11-29 00:26:28,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:28,720 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 00:26:28,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:26:28,723 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:28,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:28,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:26:28,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:28,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-29 00:26:28,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:28,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:26:28,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:28,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:26:28,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:28,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:26:28,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:28,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:26:28,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:28,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:26:28,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:28,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:26:28,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:28,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:26:28,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:28,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:26:29,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:29,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:26:29,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:29,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:26:29,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:29,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:26:29,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:29,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:26:29,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:29,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 00:26:29,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:29,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:26:29,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:29,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:26:29,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:29,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:26:29,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:29,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:26:29,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:29,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:26:29,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:29,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:26:29,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:29,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:26:29,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:29,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:26:29,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:29,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:26:29,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:29,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:26:29,208 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 00:26:29,208 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:29,209 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:26:29,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937011946] [2023-11-29 00:26:29,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937011946] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:29,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:29,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:26:29,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969674715] [2023-11-29 00:26:29,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:29,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:26:29,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:26:29,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:26:29,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:26:29,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2023-11-29 00:26:29,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 00:26:29,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:26:29,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2023-11-29 00:26:29,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:26:29,734 INFO L124 PetriNetUnfolderBase]: 306/746 cut-off events. [2023-11-29 00:26:29,734 INFO L125 PetriNetUnfolderBase]: For 76/77 co-relation queries the response was YES. [2023-11-29 00:26:29,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1247 conditions, 746 events. 306/746 cut-off events. For 76/77 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4205 event pairs, 202 based on Foata normal form. 1/567 useless extension candidates. Maximal degree in co-relation 1020. Up to 441 conditions per place. [2023-11-29 00:26:29,746 INFO L140 encePairwiseOnDemand]: 74/80 looper letters, 29 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-11-29 00:26:29,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 71 transitions, 222 flow [2023-11-29 00:26:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:26:29,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:26:29,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2023-11-29 00:26:29,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6958333333333333 [2023-11-29 00:26:29,762 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2023-11-29 00:26:29,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2023-11-29 00:26:29,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:26:29,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2023-11-29 00:26:29,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 00:26:29,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 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 00:26:29,773 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 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 00:26:29,775 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 170 flow. Second operand 3 states and 167 transitions. [2023-11-29 00:26:29,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 71 transitions, 222 flow [2023-11-29 00:26:29,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 210 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 00:26:29,784 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 152 flow [2023-11-29 00:26:29,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-11-29 00:26:29,789 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -9 predicate places. [2023-11-29 00:26:29,790 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 152 flow [2023-11-29 00:26:29,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 00:26:29,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:26:29,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:26:29,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:29,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:29,991 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:26:29,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:29,992 INFO L85 PathProgramCache]: Analyzing trace with hash 920709, now seen corresponding path program 1 times [2023-11-29 00:26:29,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:26:29,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137945634] [2023-11-29 00:26:29,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:29,993 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 00:26:29,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:26:29,994 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:29,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:30,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:26:30,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:30,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-29 00:26:30,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:26:30,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:26:30,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:30,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:26:30,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:30,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:26:30,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:30,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:30,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:26:30,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:30,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:26:30,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:26:30,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:30,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:30,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:26:30,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:30,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:26:30,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:30,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:26:30,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:30,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:26:30,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:30,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:30,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:26:30,559 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 00:26:30,559 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:30,560 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:26:30,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137945634] [2023-11-29 00:26:30,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137945634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:30,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:30,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:26:30,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961907884] [2023-11-29 00:26:30,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:30,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:26:30,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:26:30,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:26:30,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:26:30,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2023-11-29 00:26:30,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 00:26:30,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:26:30,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2023-11-29 00:26:30,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:26:31,318 INFO L124 PetriNetUnfolderBase]: 309/755 cut-off events. [2023-11-29 00:26:31,318 INFO L125 PetriNetUnfolderBase]: For 21/22 co-relation queries the response was YES. [2023-11-29 00:26:31,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1235 conditions, 755 events. 309/755 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4223 event pairs, 202 based on Foata normal form. 0/571 useless extension candidates. Maximal degree in co-relation 1185. Up to 454 conditions per place. [2023-11-29 00:26:31,325 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 33 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2023-11-29 00:26:31,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 80 transitions, 258 flow [2023-11-29 00:26:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:26:31,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:26:31,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 222 transitions. [2023-11-29 00:26:31,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.69375 [2023-11-29 00:26:31,329 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 222 transitions. [2023-11-29 00:26:31,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 222 transitions. [2023-11-29 00:26:31,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:26:31,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 222 transitions. [2023-11-29 00:26:31,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 00:26:31,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 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 00:26:31,334 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 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 00:26:31,334 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 152 flow. Second operand 4 states and 222 transitions. [2023-11-29 00:26:31,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 80 transitions, 258 flow [2023-11-29 00:26:31,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 80 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:26:31,337 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 230 flow [2023-11-29 00:26:31,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2023-11-29 00:26:31,338 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -5 predicate places. [2023-11-29 00:26:31,338 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 230 flow [2023-11-29 00:26:31,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 00:26:31,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:26:31,339 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-29 00:26:31,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:31,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:31,541 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:26:31,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:31,541 INFO L85 PathProgramCache]: Analyzing trace with hash 884832172, now seen corresponding path program 1 times [2023-11-29 00:26:31,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:26:31,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262286203] [2023-11-29 00:26:31,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:31,542 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 00:26:31,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:26:31,544 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:31,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:31,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:26:31,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:31,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 00:26:31,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:31,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:26:31,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:31,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:31,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:26:31,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:26:31,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:31,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:31,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:26:31,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:31,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:26:31,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:26:31,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:31,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:26:31,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:31,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:31,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:26:31,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:31,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:26:31,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:31,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:26:31,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:26:31,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:31,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:26:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:26:32,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:26:32,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:26:32,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262286203] [2023-11-29 00:26:32,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262286203] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:26:32,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:26:32,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 00:26:32,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929335932] [2023-11-29 00:26:32,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:32,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:26:32,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:26:32,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:26:32,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:26:33,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2023-11-29 00:26:33,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 230 flow. Second operand has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 00:26:33,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:26:33,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2023-11-29 00:26:33,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:26:35,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:26:37,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:26:38,017 INFO L124 PetriNetUnfolderBase]: 318/782 cut-off events. [2023-11-29 00:26:38,018 INFO L125 PetriNetUnfolderBase]: For 29/30 co-relation queries the response was YES. [2023-11-29 00:26:38,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1353 conditions, 782 events. 318/782 cut-off events. For 29/30 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4398 event pairs, 202 based on Foata normal form. 0/598 useless extension candidates. Maximal degree in co-relation 1199. Up to 457 conditions per place. [2023-11-29 00:26:38,024 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 33 selfloop transitions, 37 changer transitions 0/107 dead transitions. [2023-11-29 00:26:38,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 107 transitions, 490 flow [2023-11-29 00:26:38,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:26:38,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 00:26:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 519 transitions. [2023-11-29 00:26:38,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64875 [2023-11-29 00:26:38,030 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 519 transitions. [2023-11-29 00:26:38,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 519 transitions. [2023-11-29 00:26:38,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:26:38,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 519 transitions. [2023-11-29 00:26:38,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 51.9) internal successors, (519), 10 states have internal predecessors, (519), 0 states have call successors, (0), 0 states 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 00:26:38,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states 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 00:26:38,038 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states 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 00:26:38,038 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 230 flow. Second operand 10 states and 519 transitions. [2023-11-29 00:26:38,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 107 transitions, 490 flow [2023-11-29 00:26:38,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 107 transitions, 490 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:26:38,042 INFO L231 Difference]: Finished difference. Result has 87 places, 107 transitions, 474 flow [2023-11-29 00:26:38,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=474, PETRI_PLACES=87, PETRI_TRANSITIONS=107} [2023-11-29 00:26:38,043 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 7 predicate places. [2023-11-29 00:26:38,043 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 107 transitions, 474 flow [2023-11-29 00:26:38,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 00:26:38,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:26:38,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 00:26:38,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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)] Forceful destruction successful, exit code 0 [2023-11-29 00:26:38,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:38,245 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:26:38,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:38,245 INFO L85 PathProgramCache]: Analyzing trace with hash 884877928, now seen corresponding path program 1 times [2023-11-29 00:26:38,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:26:38,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835189481] [2023-11-29 00:26:38,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:38,246 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 00:26:38,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:26:38,247 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:38,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:38,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:26:38,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:38,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:38,439 INFO L349 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2023-11-29 00:26:38,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 37 [2023-11-29 00:26:38,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:38,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:38,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:38,493 INFO L349 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2023-11-29 00:26:38,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2023-11-29 00:26:38,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:38,525 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 00:26:38,576 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 00:26:38,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 00:26:38,604 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 00:26:38,604 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:38,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:26:38,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835189481] [2023-11-29 00:26:38,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835189481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:38,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:38,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:26:38,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247702187] [2023-11-29 00:26:38,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:38,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:26:38,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:26:38,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:26:38,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:26:38,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 80 [2023-11-29 00:26:38,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 474 flow. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 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 00:26:38,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:26:38,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 80 [2023-11-29 00:26:38,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:26:39,076 INFO L124 PetriNetUnfolderBase]: 318/754 cut-off events. [2023-11-29 00:26:39,076 INFO L125 PetriNetUnfolderBase]: For 61/62 co-relation queries the response was YES. [2023-11-29 00:26:39,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1388 conditions, 754 events. 318/754 cut-off events. For 61/62 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4052 event pairs, 202 based on Foata normal form. 46/650 useless extension candidates. Maximal degree in co-relation 1299. Up to 485 conditions per place. [2023-11-29 00:26:39,082 INFO L140 encePairwiseOnDemand]: 77/80 looper letters, 66 selfloop transitions, 1 changer transitions 0/105 dead transitions. [2023-11-29 00:26:39,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 105 transitions, 604 flow [2023-11-29 00:26:39,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:26:39,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:26:39,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-11-29 00:26:39,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2023-11-29 00:26:39,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-11-29 00:26:39,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-11-29 00:26:39,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:26:39,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-11-29 00:26:39,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 00:26:39,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 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 00:26:39,086 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 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 00:26:39,086 INFO L175 Difference]: Start difference. First operand has 87 places, 107 transitions, 474 flow. Second operand 3 states and 168 transitions. [2023-11-29 00:26:39,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 105 transitions, 604 flow [2023-11-29 00:26:39,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 105 transitions, 509 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-11-29 00:26:39,094 INFO L231 Difference]: Finished difference. Result has 83 places, 105 transitions, 377 flow [2023-11-29 00:26:39,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=377, PETRI_PLACES=83, PETRI_TRANSITIONS=105} [2023-11-29 00:26:39,095 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 3 predicate places. [2023-11-29 00:26:39,096 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 105 transitions, 377 flow [2023-11-29 00:26:39,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 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 00:26:39,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:26:39,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 00:26:39,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:39,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:39,299 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:26:39,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:39,299 INFO L85 PathProgramCache]: Analyzing trace with hash 884877929, now seen corresponding path program 1 times [2023-11-29 00:26:39,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:26:39,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501598200] [2023-11-29 00:26:39,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:39,300 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 00:26:39,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:26:39,301 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:39,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:39,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:26:39,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:39,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:39,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:39,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 00:26:39,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:39,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:39,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 00:26:39,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:39,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:39,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:39,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:26:39,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:39,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:39,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:39,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:39,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 00:26:39,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:39,573 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 00:26:39,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:39,602 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 00:26:39,647 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 00:26:39,647 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:39,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:26:39,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501598200] [2023-11-29 00:26:39,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501598200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:39,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:39,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:26:39,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160490507] [2023-11-29 00:26:39,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:39,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:26:39,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:26:39,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:26:39,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:26:39,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 80 [2023-11-29 00:26:39,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 105 transitions, 377 flow. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 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 00:26:39,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:26:39,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 80 [2023-11-29 00:26:39,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:26:40,162 INFO L124 PetriNetUnfolderBase]: 318/726 cut-off events. [2023-11-29 00:26:40,162 INFO L125 PetriNetUnfolderBase]: For 41/42 co-relation queries the response was YES. [2023-11-29 00:26:40,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1315 conditions, 726 events. 318/726 cut-off events. For 41/42 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3700 event pairs, 202 based on Foata normal form. 46/648 useless extension candidates. Maximal degree in co-relation 1302. Up to 485 conditions per place. [2023-11-29 00:26:40,167 INFO L140 encePairwiseOnDemand]: 77/80 looper letters, 66 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2023-11-29 00:26:40,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 103 transitions, 507 flow [2023-11-29 00:26:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:26:40,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:26:40,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-11-29 00:26:40,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2023-11-29 00:26:40,169 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-11-29 00:26:40,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-11-29 00:26:40,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:26:40,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-11-29 00:26:40,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 00:26:40,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 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 00:26:40,172 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 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 00:26:40,172 INFO L175 Difference]: Start difference. First operand has 83 places, 105 transitions, 377 flow. Second operand 3 states and 168 transitions. [2023-11-29 00:26:40,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 103 transitions, 507 flow [2023-11-29 00:26:40,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 103 transitions, 506 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:26:40,177 INFO L231 Difference]: Finished difference. Result has 82 places, 103 transitions, 374 flow [2023-11-29 00:26:40,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=374, PETRI_PLACES=82, PETRI_TRANSITIONS=103} [2023-11-29 00:26:40,178 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 2 predicate places. [2023-11-29 00:26:40,178 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 103 transitions, 374 flow [2023-11-29 00:26:40,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 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 00:26:40,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:26:40,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:40,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-29 00:26:40,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:40,381 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:26:40,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:40,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1109982414, now seen corresponding path program 1 times [2023-11-29 00:26:40,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:26:40,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585583883] [2023-11-29 00:26:40,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:40,382 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 00:26:40,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:26:40,383 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:40,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:40,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:26:40,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:40,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,519 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 15 treesize of output 11 [2023-11-29 00:26:40,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,557 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:26:40,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-29 00:26:40,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-11-29 00:26:40,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,631 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:26:40,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-29 00:26:40,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,661 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:26:40,662 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 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 00:26:40,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 00:26:40,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,711 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:26:40,711 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 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 00:26:40,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-29 00:26:40,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:40,751 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 00:26:40,785 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 00:26:40,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 00:26:40,844 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 00:26:40,844 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:40,844 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:26:40,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585583883] [2023-11-29 00:26:40,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585583883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:40,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:40,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:26:40,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113997976] [2023-11-29 00:26:40,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:40,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:26:40,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:26:40,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:26:40,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:26:40,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 80 [2023-11-29 00:26:40,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 103 transitions, 374 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 00:26:40,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:26:40,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 80 [2023-11-29 00:26:40,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:26:41,225 INFO L124 PetriNetUnfolderBase]: 318/715 cut-off events. [2023-11-29 00:26:41,226 INFO L125 PetriNetUnfolderBase]: For 41/42 co-relation queries the response was YES. [2023-11-29 00:26:41,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 715 events. 318/715 cut-off events. For 41/42 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3582 event pairs, 202 based on Foata normal form. 12/614 useless extension candidates. Maximal degree in co-relation 1291. Up to 485 conditions per place. [2023-11-29 00:26:41,230 INFO L140 encePairwiseOnDemand]: 77/80 looper letters, 66 selfloop transitions, 1 changer transitions 0/101 dead transitions. [2023-11-29 00:26:41,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 101 transitions, 504 flow [2023-11-29 00:26:41,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:26:41,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:26:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-11-29 00:26:41,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2023-11-29 00:26:41,233 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-11-29 00:26:41,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-11-29 00:26:41,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:26:41,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-11-29 00:26:41,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 00:26:41,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 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 00:26:41,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 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 00:26:41,234 INFO L175 Difference]: Start difference. First operand has 82 places, 103 transitions, 374 flow. Second operand 3 states and 168 transitions. [2023-11-29 00:26:41,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 101 transitions, 504 flow [2023-11-29 00:26:41,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 101 transitions, 503 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:26:41,237 INFO L231 Difference]: Finished difference. Result has 81 places, 101 transitions, 371 flow [2023-11-29 00:26:41,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=371, PETRI_PLACES=81, PETRI_TRANSITIONS=101} [2023-11-29 00:26:41,239 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 1 predicate places. [2023-11-29 00:26:41,239 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 101 transitions, 371 flow [2023-11-29 00:26:41,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 00:26:41,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:26:41,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:41,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:41,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:41,442 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:26:41,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:41,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1109982413, now seen corresponding path program 1 times [2023-11-29 00:26:41,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:26:41,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730266867] [2023-11-29 00:26:41,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:41,443 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 00:26:41,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:26:41,444 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:41,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:41,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:26:41,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:41,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:41,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 00:26:41,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:41,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 00:26:41,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:41,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:41,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:26:41,646 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:26:41,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:41,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:41,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:41,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:26:41,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:41,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:41,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:41,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 00:26:41,739 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:26:41,744 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:26:41,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:41,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:41,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:41,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:26:41,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:41,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:41,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:26:41,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:41,824 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 00:26:41,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:41,850 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 00:26:41,920 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 00:26:41,920 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:41,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:26:41,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730266867] [2023-11-29 00:26:41,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730266867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:41,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:41,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:26:41,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119655432] [2023-11-29 00:26:41,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:41,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:26:41,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:26:41,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:26:41,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:26:42,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 80 [2023-11-29 00:26:42,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 101 transitions, 371 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 00:26:42,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:26:42,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 80 [2023-11-29 00:26:42,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:26:42,376 INFO L124 PetriNetUnfolderBase]: 318/704 cut-off events. [2023-11-29 00:26:42,376 INFO L125 PetriNetUnfolderBase]: For 41/42 co-relation queries the response was YES. [2023-11-29 00:26:42,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1295 conditions, 704 events. 318/704 cut-off events. For 41/42 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3457 event pairs, 202 based on Foata normal form. 12/614 useless extension candidates. Maximal degree in co-relation 1280. Up to 485 conditions per place. [2023-11-29 00:26:42,382 INFO L140 encePairwiseOnDemand]: 77/80 looper letters, 66 selfloop transitions, 1 changer transitions 0/99 dead transitions. [2023-11-29 00:26:42,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 99 transitions, 501 flow [2023-11-29 00:26:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:26:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:26:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-11-29 00:26:42,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2023-11-29 00:26:42,385 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-11-29 00:26:42,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-11-29 00:26:42,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:26:42,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-11-29 00:26:42,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 00:26:42,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 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 00:26:42,387 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 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 00:26:42,387 INFO L175 Difference]: Start difference. First operand has 81 places, 101 transitions, 371 flow. Second operand 3 states and 168 transitions. [2023-11-29 00:26:42,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 99 transitions, 501 flow [2023-11-29 00:26:42,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 99 transitions, 500 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:26:42,391 INFO L231 Difference]: Finished difference. Result has 80 places, 99 transitions, 368 flow [2023-11-29 00:26:42,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=368, PETRI_PLACES=80, PETRI_TRANSITIONS=99} [2023-11-29 00:26:42,392 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 0 predicate places. [2023-11-29 00:26:42,392 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 99 transitions, 368 flow [2023-11-29 00:26:42,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 00:26:42,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:26:42,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:42,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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)] Forceful destruction successful, exit code 0 [2023-11-29 00:26:42,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:42,593 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:26:42,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:42,594 INFO L85 PathProgramCache]: Analyzing trace with hash -49710163, now seen corresponding path program 1 times [2023-11-29 00:26:42,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:26:42,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188885236] [2023-11-29 00:26:42,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:42,594 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 00:26:42,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:26:42,595 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:42,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:42,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:26:42,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:42,719 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 00:26:42,719 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:42,720 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:26:42,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188885236] [2023-11-29 00:26:42,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188885236] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:42,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:42,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:26:42,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323135345] [2023-11-29 00:26:42,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:42,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:26:42,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:26:42,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:26:42,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:26:42,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 80 [2023-11-29 00:26:42,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 99 transitions, 368 flow. Second operand has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states 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 00:26:42,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:26:42,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 80 [2023-11-29 00:26:42,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:26:43,328 INFO L124 PetriNetUnfolderBase]: 671/1507 cut-off events. [2023-11-29 00:26:43,328 INFO L125 PetriNetUnfolderBase]: For 62/64 co-relation queries the response was YES. [2023-11-29 00:26:43,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2648 conditions, 1507 events. 671/1507 cut-off events. For 62/64 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 9016 event pairs, 402 based on Foata normal form. 2/1253 useless extension candidates. Maximal degree in co-relation 2632. Up to 598 conditions per place. [2023-11-29 00:26:43,337 INFO L140 encePairwiseOnDemand]: 68/80 looper letters, 85 selfloop transitions, 18 changer transitions 0/134 dead transitions. [2023-11-29 00:26:43,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 134 transitions, 657 flow [2023-11-29 00:26:43,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:26:43,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:26:43,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 355 transitions. [2023-11-29 00:26:43,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7395833333333334 [2023-11-29 00:26:43,340 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 355 transitions. [2023-11-29 00:26:43,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 355 transitions. [2023-11-29 00:26:43,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:26:43,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 355 transitions. [2023-11-29 00:26:43,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 00:26:43,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 00:26:43,343 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 00:26:43,343 INFO L175 Difference]: Start difference. First operand has 80 places, 99 transitions, 368 flow. Second operand 6 states and 355 transitions. [2023-11-29 00:26:43,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 134 transitions, 657 flow [2023-11-29 00:26:43,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 134 transitions, 656 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:26:43,347 INFO L231 Difference]: Finished difference. Result has 88 places, 103 transitions, 452 flow [2023-11-29 00:26:43,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=452, PETRI_PLACES=88, PETRI_TRANSITIONS=103} [2023-11-29 00:26:43,348 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 8 predicate places. [2023-11-29 00:26:43,348 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 103 transitions, 452 flow [2023-11-29 00:26:43,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states 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 00:26:43,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:26:43,349 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-29 00:26:43,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:43,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:43,552 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:26:43,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:43,552 INFO L85 PathProgramCache]: Analyzing trace with hash 632055457, now seen corresponding path program 2 times [2023-11-29 00:26:43,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:26:43,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699267321] [2023-11-29 00:26:43,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:26:43,553 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 00:26:43,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:26:43,554 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:43,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:26:43,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:26:43,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:26:43,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:26:43,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:43,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 00:26:43,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:26:43,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:43,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,711 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 8 treesize of output 1 [2023-11-29 00:26:43,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:43,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:26:43,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:26:43,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:43,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:26:43,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:43,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:43,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:26:43,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:26:43,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:43,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:26:43,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:43,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:43,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:26:43,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:43,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:26:43,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:26:43,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:26:43,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:26:43,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:43,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:26:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:26:44,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:26:44,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:26:44,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699267321] [2023-11-29 00:26:44,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699267321] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:26:44,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:26:44,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 00:26:44,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573552732] [2023-11-29 00:26:44,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:44,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:26:44,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:26:44,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:26:44,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:26:48,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2023-11-29 00:26:48,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 103 transitions, 452 flow. Second operand has 14 states, 14 states have (on average 45.57142857142857) internal successors, (638), 14 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:26:48,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:26:48,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2023-11-29 00:26:48,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:26:52,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:26:55,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:26:58,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:01,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:03,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:06,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:09,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:12,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:14,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:17,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:20,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:22,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:25,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:27,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:29,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:32,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:34,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:38,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:40,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:41,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:42,132 INFO L124 PetriNetUnfolderBase]: 600/1367 cut-off events. [2023-11-29 00:27:42,132 INFO L125 PetriNetUnfolderBase]: For 448/455 co-relation queries the response was YES. [2023-11-29 00:27:42,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2814 conditions, 1367 events. 600/1367 cut-off events. For 448/455 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 8032 event pairs, 404 based on Foata normal form. 18/1188 useless extension candidates. Maximal degree in co-relation 2793. Up to 865 conditions per place. [2023-11-29 00:27:42,141 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 36 selfloop transitions, 92 changer transitions 0/157 dead transitions. [2023-11-29 00:27:42,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 157 transitions, 1008 flow [2023-11-29 00:27:42,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:27:42,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 00:27:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1110 transitions. [2023-11-29 00:27:42,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306818181818182 [2023-11-29 00:27:42,147 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1110 transitions. [2023-11-29 00:27:42,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1110 transitions. [2023-11-29 00:27:42,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:27:42,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1110 transitions. [2023-11-29 00:27:42,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 50.45454545454545) internal successors, (1110), 22 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 00:27:42,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 80.0) internal successors, (1840), 23 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states 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 00:27:42,154 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 80.0) internal successors, (1840), 23 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states 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 00:27:42,154 INFO L175 Difference]: Start difference. First operand has 88 places, 103 transitions, 452 flow. Second operand 22 states and 1110 transitions. [2023-11-29 00:27:42,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 157 transitions, 1008 flow [2023-11-29 00:27:42,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 157 transitions, 1004 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-29 00:27:42,160 INFO L231 Difference]: Finished difference. Result has 115 places, 157 transitions, 1018 flow [2023-11-29 00:27:42,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1018, PETRI_PLACES=115, PETRI_TRANSITIONS=157} [2023-11-29 00:27:42,160 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 35 predicate places. [2023-11-29 00:27:42,161 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 157 transitions, 1018 flow [2023-11-29 00:27:42,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 45.57142857142857) internal successors, (638), 14 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:27:42,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:27:42,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:27:42,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:42,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:42,362 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:27:42,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:27:42,362 INFO L85 PathProgramCache]: Analyzing trace with hash -531952674, now seen corresponding path program 1 times [2023-11-29 00:27:42,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:27:42,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717323512] [2023-11-29 00:27:42,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:42,363 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 00:27:42,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:27:42,363 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:42,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:42,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:27:42,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:27:42,479 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 00:27:42,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2023-11-29 00:27:42,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:42,491 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:27:42,491 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 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 00:27:42,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:42,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:42,515 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:27:42,515 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 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 00:27:42,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:42,526 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:27:42,526 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 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 00:27:42,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:42,535 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:27:42,535 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 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 00:27:42,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:42,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:42,556 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:27:42,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-29 00:27:42,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:42,567 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:27:42,567 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 21 treesize of output 1 [2023-11-29 00:27:42,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:42,577 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:27:42,578 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 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 00:27:42,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:42,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:42,601 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:27:42,602 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 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 00:27:42,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:42,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:42,628 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:27:42,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-29 00:27:42,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:42,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:42,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:42,666 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:27:42,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-29 00:27:42,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:42,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:42,689 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:27:42,689 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 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 00:27:42,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:42,709 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 00:27:42,746 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 00:27:42,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 00:27:42,824 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 00:27:42,824 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:27:42,824 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:27:42,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717323512] [2023-11-29 00:27:42,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717323512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:27:42,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:27:42,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:27:42,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109614853] [2023-11-29 00:27:42,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:27:42,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:27:42,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:27:42,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:27:42,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:27:42,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 80 [2023-11-29 00:27:42,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 157 transitions, 1018 flow. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 00:27:42,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:27:42,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 80 [2023-11-29 00:27:42,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:27:43,299 INFO L124 PetriNetUnfolderBase]: 600/1356 cut-off events. [2023-11-29 00:27:43,299 INFO L125 PetriNetUnfolderBase]: For 460/467 co-relation queries the response was YES. [2023-11-29 00:27:43,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2940 conditions, 1356 events. 600/1356 cut-off events. For 460/467 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7902 event pairs, 404 based on Foata normal form. 25/1201 useless extension candidates. Maximal degree in co-relation 2911. Up to 942 conditions per place. [2023-11-29 00:27:43,312 INFO L140 encePairwiseOnDemand]: 77/80 looper letters, 124 selfloop transitions, 1 changer transitions 0/155 dead transitions. [2023-11-29 00:27:43,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 155 transitions, 1264 flow [2023-11-29 00:27:43,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:27:43,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:27:43,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-11-29 00:27:43,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2023-11-29 00:27:43,315 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-11-29 00:27:43,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-11-29 00:27:43,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:27:43,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-11-29 00:27:43,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 00:27:43,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 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 00:27:43,317 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 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 00:27:43,317 INFO L175 Difference]: Start difference. First operand has 115 places, 157 transitions, 1018 flow. Second operand 3 states and 168 transitions. [2023-11-29 00:27:43,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 155 transitions, 1264 flow [2023-11-29 00:27:43,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 155 transitions, 1030 flow, removed 67 selfloop flow, removed 9 redundant places. [2023-11-29 00:27:43,334 INFO L231 Difference]: Finished difference. Result has 106 places, 155 transitions, 782 flow [2023-11-29 00:27:43,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=782, PETRI_PLACES=106, PETRI_TRANSITIONS=155} [2023-11-29 00:27:43,335 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 26 predicate places. [2023-11-29 00:27:43,335 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 155 transitions, 782 flow [2023-11-29 00:27:43,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 00:27:43,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:27:43,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:27:43,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:43,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:43,536 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:27:43,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:27:43,537 INFO L85 PathProgramCache]: Analyzing trace with hash -531952673, now seen corresponding path program 1 times [2023-11-29 00:27:43,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:27:43,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112481064] [2023-11-29 00:27:43,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:43,537 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 00:27:43,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:27:43,538 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:43,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:43,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:27:43,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:27:43,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 00:27:43,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,676 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:27:43,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:27:43,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:27:43,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:27:43,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,715 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:27:43,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:27:43,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:27:43,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,745 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:27:43,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:27:43,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,780 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:27:43,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,787 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:27:43,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,818 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 00:27:43,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:43,853 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 00:27:43,967 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 00:27:43,967 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:27:43,967 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:27:43,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112481064] [2023-11-29 00:27:43,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112481064] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:27:43,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:27:43,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:27:43,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143784464] [2023-11-29 00:27:43,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:27:43,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:27:43,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:27:43,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:27:43,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:27:44,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 80 [2023-11-29 00:27:44,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 155 transitions, 782 flow. Second operand has 5 states, 5 states have (on average 46.8) internal successors, (234), 5 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:27:44,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:27:44,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 80 [2023-11-29 00:27:44,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:27:44,557 INFO L124 PetriNetUnfolderBase]: 600/1345 cut-off events. [2023-11-29 00:27:44,557 INFO L125 PetriNetUnfolderBase]: For 457/464 co-relation queries the response was YES. [2023-11-29 00:27:44,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2813 conditions, 1345 events. 600/1345 cut-off events. For 457/464 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7842 event pairs, 404 based on Foata normal form. 25/1201 useless extension candidates. Maximal degree in co-relation 2784. Up to 942 conditions per place. [2023-11-29 00:27:44,566 INFO L140 encePairwiseOnDemand]: 77/80 looper letters, 124 selfloop transitions, 1 changer transitions 0/153 dead transitions. [2023-11-29 00:27:44,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 153 transitions, 1028 flow [2023-11-29 00:27:44,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:27:44,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:27:44,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-11-29 00:27:44,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2023-11-29 00:27:44,569 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-11-29 00:27:44,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-11-29 00:27:44,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:27:44,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-11-29 00:27:44,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 00:27:44,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 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 00:27:44,571 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 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 00:27:44,571 INFO L175 Difference]: Start difference. First operand has 106 places, 155 transitions, 782 flow. Second operand 3 states and 168 transitions. [2023-11-29 00:27:44,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 153 transitions, 1028 flow [2023-11-29 00:27:44,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 153 transitions, 1027 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:27:44,576 INFO L231 Difference]: Finished difference. Result has 105 places, 153 transitions, 779 flow [2023-11-29 00:27:44,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=779, PETRI_PLACES=105, PETRI_TRANSITIONS=153} [2023-11-29 00:27:44,577 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 25 predicate places. [2023-11-29 00:27:44,577 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 153 transitions, 779 flow [2023-11-29 00:27:44,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.8) internal successors, (234), 5 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:27:44,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:27:44,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:27:44,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-29 00:27:44,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:44,779 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:27:44,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:27:44,779 INFO L85 PathProgramCache]: Analyzing trace with hash 689358905, now seen corresponding path program 1 times [2023-11-29 00:27:44,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:27:44,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421527465] [2023-11-29 00:27:44,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:44,779 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 00:27:44,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:27:44,780 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:44,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:44,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:27:44,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:27:44,941 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 00:27:44,941 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:27:44,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:27:44,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421527465] [2023-11-29 00:27:44,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421527465] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:27:44,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:27:44,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:27:44,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186923168] [2023-11-29 00:27:44,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:27:44,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:27:44,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:27:44,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:27:44,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:27:44,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 80 [2023-11-29 00:27:44,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 153 transitions, 779 flow. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states 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 00:27:44,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:27:44,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 80 [2023-11-29 00:27:44,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:27:45,536 INFO L124 PetriNetUnfolderBase]: 656/1468 cut-off events. [2023-11-29 00:27:45,536 INFO L125 PetriNetUnfolderBase]: For 521/570 co-relation queries the response was YES. [2023-11-29 00:27:45,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3038 conditions, 1468 events. 656/1468 cut-off events. For 521/570 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 8752 event pairs, 385 based on Foata normal form. 0/1251 useless extension candidates. Maximal degree in co-relation 3008. Up to 651 conditions per place. [2023-11-29 00:27:45,545 INFO L140 encePairwiseOnDemand]: 70/80 looper letters, 124 selfloop transitions, 30 changer transitions 0/181 dead transitions. [2023-11-29 00:27:45,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 181 transitions, 1159 flow [2023-11-29 00:27:45,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:27:45,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:27:45,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 350 transitions. [2023-11-29 00:27:45,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7291666666666666 [2023-11-29 00:27:45,547 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 350 transitions. [2023-11-29 00:27:45,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 350 transitions. [2023-11-29 00:27:45,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:27:45,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 350 transitions. [2023-11-29 00:27:45,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 58.333333333333336) internal successors, (350), 6 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:27:45,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 00:27:45,550 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 00:27:45,550 INFO L175 Difference]: Start difference. First operand has 105 places, 153 transitions, 779 flow. Second operand 6 states and 350 transitions. [2023-11-29 00:27:45,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 181 transitions, 1159 flow [2023-11-29 00:27:45,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 181 transitions, 1158 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:27:45,555 INFO L231 Difference]: Finished difference. Result has 111 places, 155 transitions, 854 flow [2023-11-29 00:27:45,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=854, PETRI_PLACES=111, PETRI_TRANSITIONS=155} [2023-11-29 00:27:45,556 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 31 predicate places. [2023-11-29 00:27:45,556 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 155 transitions, 854 flow [2023-11-29 00:27:45,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states 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 00:27:45,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:27:45,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:27:45,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-11-29 00:27:45,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:45,757 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:27:45,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:27:45,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1807599982, now seen corresponding path program 1 times [2023-11-29 00:27:45,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:27:45,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277188411] [2023-11-29 00:27:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:45,758 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 00:27:45,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:27:45,759 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:45,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:45,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:27:45,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:27:45,923 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 00:27:45,923 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:27:45,923 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:27:45,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277188411] [2023-11-29 00:27:45,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277188411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:27:45,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:27:45,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:27:45,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547513414] [2023-11-29 00:27:45,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:27:45,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:27:45,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:27:45,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:27:45,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:27:46,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 80 [2023-11-29 00:27:46,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 155 transitions, 854 flow. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 00:27:46,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:27:46,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 80 [2023-11-29 00:27:46,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:27:46,424 INFO L124 PetriNetUnfolderBase]: 511/1148 cut-off events. [2023-11-29 00:27:46,424 INFO L125 PetriNetUnfolderBase]: For 697/779 co-relation queries the response was YES. [2023-11-29 00:27:46,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2690 conditions, 1148 events. 511/1148 cut-off events. For 697/779 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6321 event pairs, 326 based on Foata normal form. 0/997 useless extension candidates. Maximal degree in co-relation 2657. Up to 587 conditions per place. [2023-11-29 00:27:46,434 INFO L140 encePairwiseOnDemand]: 70/80 looper letters, 117 selfloop transitions, 30 changer transitions 0/174 dead transitions. [2023-11-29 00:27:46,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 174 transitions, 1210 flow [2023-11-29 00:27:46,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:27:46,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:27:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 343 transitions. [2023-11-29 00:27:46,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7145833333333333 [2023-11-29 00:27:46,437 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 343 transitions. [2023-11-29 00:27:46,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 343 transitions. [2023-11-29 00:27:46,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:27:46,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 343 transitions. [2023-11-29 00:27:46,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 00:27:46,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 00:27:46,440 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 00:27:46,440 INFO L175 Difference]: Start difference. First operand has 111 places, 155 transitions, 854 flow. Second operand 6 states and 343 transitions. [2023-11-29 00:27:46,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 174 transitions, 1210 flow [2023-11-29 00:27:46,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 174 transitions, 1156 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:27:46,449 INFO L231 Difference]: Finished difference. Result has 115 places, 157 transitions, 876 flow [2023-11-29 00:27:46,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=876, PETRI_PLACES=115, PETRI_TRANSITIONS=157} [2023-11-29 00:27:46,450 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 35 predicate places. [2023-11-29 00:27:46,450 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 157 transitions, 876 flow [2023-11-29 00:27:46,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 00:27:46,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:27:46,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:27:46,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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)] Forceful destruction successful, exit code 0 [2023-11-29 00:27:46,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:46,652 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:27:46,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:27:46,652 INFO L85 PathProgramCache]: Analyzing trace with hash 351664680, now seen corresponding path program 1 times [2023-11-29 00:27:46,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:27:46,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008496287] [2023-11-29 00:27:46,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:46,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:27:46,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:27:46,653 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:46,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:46,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:27:46,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:27:46,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:27:46,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:27:46,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:27:46,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:27:46,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:27:46,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:27:46,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:27:46,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:27:46,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:27:46,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:27:46,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:27:46,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:27:46,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:27:46,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:27:46,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:27:46,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:27:46,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:27:46,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:27:46,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 00:27:46,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:27:46,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:27:46,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:27:46,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:27:46,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:46,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:27:47,008 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-29 00:27:47,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-29 00:27:47,029 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 00:27:47,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 00:27:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:27:47,049 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:27:47,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:27:47,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008496287] [2023-11-29 00:27:47,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008496287] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:27:47,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:27:47,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:27:47,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951819561] [2023-11-29 00:27:47,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:27:47,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:27:47,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:27:47,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:27:47,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:27:47,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 80 [2023-11-29 00:27:47,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 157 transitions, 876 flow. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 00:27:47,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:27:47,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 80 [2023-11-29 00:27:47,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:27:47,493 INFO L124 PetriNetUnfolderBase]: 511/1110 cut-off events. [2023-11-29 00:27:47,493 INFO L125 PetriNetUnfolderBase]: For 819/897 co-relation queries the response was YES. [2023-11-29 00:27:47,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2815 conditions, 1110 events. 511/1110 cut-off events. For 819/897 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5901 event pairs, 365 based on Foata normal form. 0/1021 useless extension candidates. Maximal degree in co-relation 2780. Up to 741 conditions per place. [2023-11-29 00:27:47,500 INFO L140 encePairwiseOnDemand]: 75/80 looper letters, 106 selfloop transitions, 24 changer transitions 0/155 dead transitions. [2023-11-29 00:27:47,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 155 transitions, 1132 flow [2023-11-29 00:27:47,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:27:47,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:27:47,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 239 transitions. [2023-11-29 00:27:47,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975 [2023-11-29 00:27:47,502 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 239 transitions. [2023-11-29 00:27:47,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 239 transitions. [2023-11-29 00:27:47,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:27:47,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 239 transitions. [2023-11-29 00:27:47,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states 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 00:27:47,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 80.0) internal successors, (480), 6 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 00:27:47,504 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 80.0) internal successors, (480), 6 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 00:27:47,504 INFO L175 Difference]: Start difference. First operand has 115 places, 157 transitions, 876 flow. Second operand 5 states and 239 transitions. [2023-11-29 00:27:47,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 155 transitions, 1132 flow [2023-11-29 00:27:47,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 155 transitions, 1078 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:27:47,510 INFO L231 Difference]: Finished difference. Result has 114 places, 155 transitions, 866 flow [2023-11-29 00:27:47,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=866, PETRI_PLACES=114, PETRI_TRANSITIONS=155} [2023-11-29 00:27:47,511 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 34 predicate places. [2023-11-29 00:27:47,511 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 155 transitions, 866 flow [2023-11-29 00:27:47,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 00:27:47,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:27:47,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:27:47,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:47,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:47,712 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:27:47,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:27:47,712 INFO L85 PathProgramCache]: Analyzing trace with hash 351664681, now seen corresponding path program 1 times [2023-11-29 00:27:47,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:27:47,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453609642] [2023-11-29 00:27:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:47,713 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 00:27:47,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:27:47,714 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:47,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:27:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:47,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 00:27:47,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:27:47,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 00:27:47,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:27:47,938 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 00:27:47,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:47,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:27:47,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:47,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:27:47,965 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 00:27:47,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:47,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:27:47,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:47,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:27:48,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:27:48,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:27:48,024 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 00:27:48,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:27:48,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:27:48,050 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 00:27:48,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:27:48,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:27:48,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:27:48,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:27:48,103 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 00:27:48,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:27:48,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:27:48,126 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 00:27:48,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:27:48,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:27:48,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:27:48,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:27:48,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:27:48,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:27:48,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:27:48,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:27:48,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:27:48,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:48,381 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 11 [2023-11-29 00:27:48,395 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 00:27:48,395 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 00:27:48,461 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-29 00:27:48,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-11-29 00:27:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:27:48,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:27:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:27:49,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:27:49,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453609642] [2023-11-29 00:27:49,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453609642] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:27:49,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:27:49,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 00:27:49,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363932394] [2023-11-29 00:27:49,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:27:49,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:27:49,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:27:49,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:27:49,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:27:59,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 80 [2023-11-29 00:27:59,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 155 transitions, 866 flow. Second operand has 14 states, 14 states have (on average 41.857142857142854) internal successors, (586), 14 states have internal predecessors, (586), 0 states have call successors, (0), 0 states 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 00:27:59,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:27:59,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 80 [2023-11-29 00:27:59,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:28:05,661 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 00:28:09,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:28:14,471 WARN L539 Checker$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 00:28:16,191 INFO L124 PetriNetUnfolderBase]: 1566/3444 cut-off events. [2023-11-29 00:28:16,191 INFO L125 PetriNetUnfolderBase]: For 1411/1654 co-relation queries the response was YES. [2023-11-29 00:28:16,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7674 conditions, 3444 events. 1566/3444 cut-off events. For 1411/1654 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 24918 event pairs, 943 based on Foata normal form. 45/2988 useless extension candidates. Maximal degree in co-relation 7639. Up to 820 conditions per place. [2023-11-29 00:28:16,212 INFO L140 encePairwiseOnDemand]: 66/80 looper letters, 137 selfloop transitions, 142 changer transitions 0/301 dead transitions. [2023-11-29 00:28:16,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 301 transitions, 2097 flow [2023-11-29 00:28:16,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 00:28:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 00:28:16,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 862 transitions. [2023-11-29 00:28:16,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6338235294117647 [2023-11-29 00:28:16,217 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 862 transitions. [2023-11-29 00:28:16,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 862 transitions. [2023-11-29 00:28:16,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:28:16,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 862 transitions. [2023-11-29 00:28:16,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 50.705882352941174) internal successors, (862), 17 states have internal predecessors, (862), 0 states have call successors, (0), 0 states 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 00:28:16,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 00:28:16,223 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 00:28:16,223 INFO L175 Difference]: Start difference. First operand has 114 places, 155 transitions, 866 flow. Second operand 17 states and 862 transitions. [2023-11-29 00:28:16,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 301 transitions, 2097 flow [2023-11-29 00:28:16,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 301 transitions, 2050 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:28:16,241 INFO L231 Difference]: Finished difference. Result has 136 places, 217 transitions, 1692 flow [2023-11-29 00:28:16,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1692, PETRI_PLACES=136, PETRI_TRANSITIONS=217} [2023-11-29 00:28:16,242 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 56 predicate places. [2023-11-29 00:28:16,242 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 217 transitions, 1692 flow [2023-11-29 00:28:16,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 41.857142857142854) internal successors, (586), 14 states have internal predecessors, (586), 0 states have call successors, (0), 0 states 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 00:28:16,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:28:16,243 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:28:16,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:28:16,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:28:16,444 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:28:16,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:28:16,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1352626963, now seen corresponding path program 1 times [2023-11-29 00:28:16,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:28:16,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317474566] [2023-11-29 00:28:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:28:16,445 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 00:28:16,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:28:16,446 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:28:16,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:28:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:28:16,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:28:16,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:28:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:28:16,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:28:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:28:16,928 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:28:16,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317474566] [2023-11-29 00:28:16,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317474566] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:28:16,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:28:16,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-29 00:28:16,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651600448] [2023-11-29 00:28:16,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:28:16,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:28:16,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:28:16,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:28:16,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:28:17,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 80 [2023-11-29 00:28:17,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 217 transitions, 1692 flow. Second operand has 14 states, 14 states have (on average 48.142857142857146) internal successors, (674), 14 states have internal predecessors, (674), 0 states have call successors, (0), 0 states 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 00:28:17,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:28:17,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 80 [2023-11-29 00:28:17,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:28:19,243 INFO L124 PetriNetUnfolderBase]: 2501/5174 cut-off events. [2023-11-29 00:28:19,243 INFO L125 PetriNetUnfolderBase]: For 4200/4747 co-relation queries the response was YES. [2023-11-29 00:28:19,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13116 conditions, 5174 events. 2501/5174 cut-off events. For 4200/4747 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 37692 event pairs, 1144 based on Foata normal form. 192/4845 useless extension candidates. Maximal degree in co-relation 13072. Up to 1493 conditions per place. [2023-11-29 00:28:19,277 INFO L140 encePairwiseOnDemand]: 66/80 looper letters, 110 selfloop transitions, 157 changer transitions 0/292 dead transitions. [2023-11-29 00:28:19,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 292 transitions, 2505 flow [2023-11-29 00:28:19,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:28:19,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 00:28:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 778 transitions. [2023-11-29 00:28:19,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6946428571428571 [2023-11-29 00:28:19,283 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 778 transitions. [2023-11-29 00:28:19,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 778 transitions. [2023-11-29 00:28:19,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:28:19,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 778 transitions. [2023-11-29 00:28:19,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 55.57142857142857) internal successors, (778), 14 states have internal predecessors, (778), 0 states have call successors, (0), 0 states 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 00:28:19,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 80.0) internal successors, (1200), 15 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 00:28:19,288 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 80.0) internal successors, (1200), 15 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 00:28:19,288 INFO L175 Difference]: Start difference. First operand has 136 places, 217 transitions, 1692 flow. Second operand 14 states and 778 transitions. [2023-11-29 00:28:19,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 292 transitions, 2505 flow [2023-11-29 00:28:19,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 292 transitions, 2491 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-11-29 00:28:19,308 INFO L231 Difference]: Finished difference. Result has 154 places, 228 transitions, 2168 flow [2023-11-29 00:28:19,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1684, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2168, PETRI_PLACES=154, PETRI_TRANSITIONS=228} [2023-11-29 00:28:19,308 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 74 predicate places. [2023-11-29 00:28:19,308 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 228 transitions, 2168 flow [2023-11-29 00:28:19,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 48.142857142857146) internal successors, (674), 14 states have internal predecessors, (674), 0 states have call successors, (0), 0 states 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 00:28:19,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:28:19,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:28:19,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:28:19,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:28:19,510 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:28:19,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:28:19,510 INFO L85 PathProgramCache]: Analyzing trace with hash 858354654, now seen corresponding path program 1 times [2023-11-29 00:28:19,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:28:19,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018261357] [2023-11-29 00:28:19,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:28:19,511 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 00:28:19,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:28:19,512 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:28:19,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:28:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:28:19,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:28:19,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:28:19,719 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 00:28:19,745 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-29 00:28:19,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-29 00:28:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:28:19,769 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:28:19,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:28:19,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018261357] [2023-11-29 00:28:19,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018261357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:28:19,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:28:19,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:28:19,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975523858] [2023-11-29 00:28:19,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:28:19,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:28:19,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:28:19,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:28:19,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:28:19,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 80 [2023-11-29 00:28:19,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 228 transitions, 2168 flow. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 00:28:19,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:28:19,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 80 [2023-11-29 00:28:19,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:28:20,732 INFO L124 PetriNetUnfolderBase]: 1967/4170 cut-off events. [2023-11-29 00:28:20,732 INFO L125 PetriNetUnfolderBase]: For 7290/7669 co-relation queries the response was YES. [2023-11-29 00:28:20,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12371 conditions, 4170 events. 1967/4170 cut-off events. For 7290/7669 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 29528 event pairs, 1418 based on Foata normal form. 0/3859 useless extension candidates. Maximal degree in co-relation 12320. Up to 2868 conditions per place. [2023-11-29 00:28:20,757 INFO L140 encePairwiseOnDemand]: 75/80 looper letters, 160 selfloop transitions, 42 changer transitions 0/226 dead transitions. [2023-11-29 00:28:20,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 226 transitions, 2568 flow [2023-11-29 00:28:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:28:20,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:28:20,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 243 transitions. [2023-11-29 00:28:20,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075 [2023-11-29 00:28:20,759 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 243 transitions. [2023-11-29 00:28:20,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 243 transitions. [2023-11-29 00:28:20,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:28:20,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 243 transitions. [2023-11-29 00:28:20,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:28:20,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 80.0) internal successors, (480), 6 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 00:28:20,761 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 80.0) internal successors, (480), 6 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 00:28:20,761 INFO L175 Difference]: Start difference. First operand has 154 places, 228 transitions, 2168 flow. Second operand 5 states and 243 transitions. [2023-11-29 00:28:20,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 226 transitions, 2568 flow [2023-11-29 00:28:20,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 226 transitions, 2453 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-11-29 00:28:20,787 INFO L231 Difference]: Finished difference. Result has 149 places, 226 transitions, 2133 flow [2023-11-29 00:28:20,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2133, PETRI_PLACES=149, PETRI_TRANSITIONS=226} [2023-11-29 00:28:20,788 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 69 predicate places. [2023-11-29 00:28:20,788 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 226 transitions, 2133 flow [2023-11-29 00:28:20,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 00:28:20,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:28:20,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:28:20,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:28:20,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:28:20,989 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:28:20,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:28:20,989 INFO L85 PathProgramCache]: Analyzing trace with hash 858354655, now seen corresponding path program 1 times [2023-11-29 00:28:20,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:28:20,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405954646] [2023-11-29 00:28:20,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:28:20,990 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 00:28:20,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:28:20,991 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:28:20,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:28:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:28:21,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 00:28:21,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:28:21,288 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 00:28:21,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:28:21,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:28:21,376 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 11 [2023-11-29 00:28:21,385 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 00:28:21,385 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 00:28:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:28:21,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:28:21,989 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:28:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:28:22,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:28:22,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405954646] [2023-11-29 00:28:22,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [405954646] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:28:22,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:28:22,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 00:28:22,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558002923] [2023-11-29 00:28:22,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:28:22,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:28:22,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:28:22,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:28:22,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:28:25,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 00:28:29,449 WARN L539 Checker$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 00:28:34,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:28:39,235 WARN L539 Checker$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 00:28:43,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:28:47,934 WARN L539 Checker$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 00:28:52,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:28:56,458 WARN L539 Checker$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 00:29:00,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:29:05,013 WARN L539 Checker$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 00:29:10,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:29:15,158 WARN L539 Checker$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 00:29:19,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 00:29:23,559 WARN L539 Checker$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 00:29:23,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 80 [2023-11-29 00:29:23,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 226 transitions, 2133 flow. Second operand has 14 states, 14 states have (on average 32.285714285714285) internal successors, (452), 14 states have internal predecessors, (452), 0 states have call successors, (0), 0 states 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 00:29:23,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:29:23,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 80 [2023-11-29 00:29:23,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:29:27,900 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32)))) (and (= c_~N~0 |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (= (_ bv1 32) |c_ULTIMATE.start_create_fresh_int_array_~i~3#1|) (bvslt (_ bv0 32) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (or (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_216| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_216|)))) (bvule |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse0)) (bvule |c_ULTIMATE.start_create_fresh_int_array_~size#1| (_ bv1073741823 32)) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_216| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_216|))) (forall ((v_ArrVal_475 (_ BitVec 32))) (bvule .cse0 (select (store |c_#length| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_216| v_ArrVal_475) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))))))) is different from false [2023-11-29 00:29:35,303 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) c_~B~0.offset)) (.cse1 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32)))) (and (bvule .cse0 (select |c_#length| c_~B~0.base)) (bvule c_~B~0.offset .cse0) (or (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_216| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_216|)))) (bvule |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse1)) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_216| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_216|))) (forall ((v_ArrVal_475 (_ BitVec 32))) (bvule .cse1 (select (store |c_#length| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_216| v_ArrVal_475) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))))))) is different from false [2023-11-29 00:29:38,548 INFO L124 PetriNetUnfolderBase]: 8087/14589 cut-off events. [2023-11-29 00:29:38,548 INFO L125 PetriNetUnfolderBase]: For 24283/26822 co-relation queries the response was YES. [2023-11-29 00:29:38,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40889 conditions, 14589 events. 8087/14589 cut-off events. For 24283/26822 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 113299 event pairs, 4349 based on Foata normal form. 0/12905 useless extension candidates. Maximal degree in co-relation 40840. Up to 4178 conditions per place. [2023-11-29 00:29:38,655 INFO L140 encePairwiseOnDemand]: 66/80 looper letters, 192 selfloop transitions, 158 changer transitions 0/370 dead transitions. [2023-11-29 00:29:38,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 370 transitions, 3494 flow [2023-11-29 00:29:38,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 00:29:38,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 00:29:38,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1031 transitions. [2023-11-29 00:29:38,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602678571428571 [2023-11-29 00:29:38,659 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1031 transitions. [2023-11-29 00:29:38,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1031 transitions. [2023-11-29 00:29:38,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:29:38,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1031 transitions. [2023-11-29 00:29:38,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 36.82142857142857) internal successors, (1031), 28 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states 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 00:29:38,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 80.0) internal successors, (2320), 29 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states 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 00:29:38,667 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 80.0) internal successors, (2320), 29 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states 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 00:29:38,667 INFO L175 Difference]: Start difference. First operand has 149 places, 226 transitions, 2133 flow. Second operand 28 states and 1031 transitions. [2023-11-29 00:29:38,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 370 transitions, 3494 flow [2023-11-29 00:29:38,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 370 transitions, 3428 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:29:38,772 INFO L231 Difference]: Finished difference. Result has 178 places, 239 transitions, 2538 flow [2023-11-29 00:29:38,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=2067, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2538, PETRI_PLACES=178, PETRI_TRANSITIONS=239} [2023-11-29 00:29:38,773 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 98 predicate places. [2023-11-29 00:29:38,773 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 239 transitions, 2538 flow [2023-11-29 00:29:38,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 32.285714285714285) internal successors, (452), 14 states have internal predecessors, (452), 0 states have call successors, (0), 0 states 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 00:29:38,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:29:38,774 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:29:38,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:29:38,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:29:38,974 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:29:38,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:29:38,975 INFO L85 PathProgramCache]: Analyzing trace with hash 245133795, now seen corresponding path program 1 times [2023-11-29 00:29:38,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:29:38,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049178931] [2023-11-29 00:29:38,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:29:38,975 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 00:29:38,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:29:38,976 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:29:38,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:29:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:29:39,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:29:39,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:29:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:29:39,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:29:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:29:39,532 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:29:39,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049178931] [2023-11-29 00:29:39,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049178931] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:29:39,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:29:39,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-29 00:29:39,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150202363] [2023-11-29 00:29:39,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:29:39,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:29:39,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:29:39,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:29:39,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:29:39,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 80 [2023-11-29 00:29:39,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 239 transitions, 2538 flow. Second operand has 14 states, 14 states have (on average 48.42857142857143) internal successors, (678), 14 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 00:29:39,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:29:39,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 80 [2023-11-29 00:29:39,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:29:43,135 INFO L124 PetriNetUnfolderBase]: 6000/11291 cut-off events. [2023-11-29 00:29:43,135 INFO L125 PetriNetUnfolderBase]: For 28521/31564 co-relation queries the response was YES. [2023-11-29 00:29:43,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36590 conditions, 11291 events. 6000/11291 cut-off events. For 28521/31564 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 88603 event pairs, 3009 based on Foata normal form. 530/11010 useless extension candidates. Maximal degree in co-relation 36536. Up to 4317 conditions per place. [2023-11-29 00:29:43,209 INFO L140 encePairwiseOnDemand]: 66/80 looper letters, 125 selfloop transitions, 161 changer transitions 0/309 dead transitions. [2023-11-29 00:29:43,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 309 transitions, 3415 flow [2023-11-29 00:29:43,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:29:43,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 00:29:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 774 transitions. [2023-11-29 00:29:43,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6910714285714286 [2023-11-29 00:29:43,212 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 774 transitions. [2023-11-29 00:29:43,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 774 transitions. [2023-11-29 00:29:43,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:29:43,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 774 transitions. [2023-11-29 00:29:43,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 55.285714285714285) internal successors, (774), 14 states have internal predecessors, (774), 0 states have call successors, (0), 0 states 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 00:29:43,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 80.0) internal successors, (1200), 15 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 00:29:43,215 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 80.0) internal successors, (1200), 15 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 00:29:43,215 INFO L175 Difference]: Start difference. First operand has 178 places, 239 transitions, 2538 flow. Second operand 14 states and 774 transitions. [2023-11-29 00:29:43,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 309 transitions, 3415 flow [2023-11-29 00:29:43,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 309 transitions, 3338 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-11-29 00:29:43,291 INFO L231 Difference]: Finished difference. Result has 191 places, 243 transitions, 2847 flow [2023-11-29 00:29:43,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2847, PETRI_PLACES=191, PETRI_TRANSITIONS=243} [2023-11-29 00:29:43,292 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 111 predicate places. [2023-11-29 00:29:43,292 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 243 transitions, 2847 flow [2023-11-29 00:29:43,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 48.42857142857143) internal successors, (678), 14 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 00:29:43,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:29:43,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:29:43,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:29:43,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:29:43,493 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:29:43,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:29:43,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1636679766, now seen corresponding path program 1 times [2023-11-29 00:29:43,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:29:43,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951474144] [2023-11-29 00:29:43,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:29:43,494 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 00:29:43,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:29:43,495 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:29:43,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 [2023-11-29 00:29:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:29:43,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 00:29:43,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:29:43,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 00:29:43,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:29:43,798 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 00:29:43,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:43,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:29:43,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:43,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:29:43,853 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 00:29:43,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:43,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:29:43,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:43,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:29:43,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:43,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:29:43,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:43,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:29:43,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:43,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:29:43,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:43,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:29:43,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:43,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:29:43,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:43,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:29:44,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:44,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:29:44,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:44,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:29:44,023 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 00:29:44,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:44,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:29:44,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:44,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:29:44,048 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 00:29:44,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:44,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:29:44,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:44,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:29:44,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:44,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:29:44,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:44,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:29:44,104 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 00:29:44,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:44,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:29:44,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:44,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:29:44,132 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 00:29:44,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:44,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:29:44,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:44,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:29:44,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:44,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:29:44,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:29:44,293 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 11 [2023-11-29 00:29:44,304 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 00:29:44,305 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 00:29:44,382 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-29 00:29:44,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-11-29 00:29:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:29:44,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:29:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:29:45,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:29:45,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951474144] [2023-11-29 00:29:45,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951474144] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:29:45,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:29:45,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 00:29:45,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980342227] [2023-11-29 00:29:45,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:29:45,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:29:45,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:29:45,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:29:45,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:29:49,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:30:03,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:30:07,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 80 [2023-11-29 00:30:07,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 243 transitions, 2847 flow. Second operand has 14 states, 14 states have (on average 41.42857142857143) internal successors, (580), 14 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:30:07,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:30:07,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 80 [2023-11-29 00:30:07,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:30:13,312 WARN L539 Checker$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 00:30:18,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:30:19,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:30:24,337 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 00:30:27,974 INFO L124 PetriNetUnfolderBase]: 6730/12921 cut-off events. [2023-11-29 00:30:27,974 INFO L125 PetriNetUnfolderBase]: For 49771/54186 co-relation queries the response was YES. [2023-11-29 00:30:28,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45744 conditions, 12921 events. 6730/12921 cut-off events. For 49771/54186 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 107090 event pairs, 2842 based on Foata normal form. 42/11915 useless extension candidates. Maximal degree in co-relation 45686. Up to 2564 conditions per place. [2023-11-29 00:30:28,072 INFO L140 encePairwiseOnDemand]: 65/80 looper letters, 208 selfloop transitions, 154 changer transitions 0/381 dead transitions. [2023-11-29 00:30:28,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 381 transitions, 4521 flow [2023-11-29 00:30:28,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 00:30:28,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 00:30:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 930 transitions. [2023-11-29 00:30:28,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118421052631579 [2023-11-29 00:30:28,075 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 930 transitions. [2023-11-29 00:30:28,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 930 transitions. [2023-11-29 00:30:28,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:30:28,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 930 transitions. [2023-11-29 00:30:28,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 48.94736842105263) internal successors, (930), 19 states have internal predecessors, (930), 0 states have call successors, (0), 0 states 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 00:30:28,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states 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 00:30:28,079 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states 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 00:30:28,079 INFO L175 Difference]: Start difference. First operand has 191 places, 243 transitions, 2847 flow. Second operand 19 states and 930 transitions. [2023-11-29 00:30:28,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 381 transitions, 4521 flow [2023-11-29 00:30:28,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 381 transitions, 4138 flow, removed 34 selfloop flow, removed 11 redundant places. [2023-11-29 00:30:28,225 INFO L231 Difference]: Finished difference. Result has 201 places, 254 transitions, 2917 flow [2023-11-29 00:30:28,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=2528, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2917, PETRI_PLACES=201, PETRI_TRANSITIONS=254} [2023-11-29 00:30:28,225 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 121 predicate places. [2023-11-29 00:30:28,225 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 254 transitions, 2917 flow [2023-11-29 00:30:28,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 41.42857142857143) internal successors, (580), 14 states have internal predecessors, (580), 0 states have call successors, (0), 0 states 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 00:30:28,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:30:28,226 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:30:28,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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)] Ended with exit code 0 [2023-11-29 00:30:28,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:30:28,427 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:30:28,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:30:28,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1366457054, now seen corresponding path program 2 times [2023-11-29 00:30:28,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:30:28,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509140224] [2023-11-29 00:30:28,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:30:28,428 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 00:30:28,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:30:28,428 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:30:28,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (22)] Waiting until timeout for monitored process [2023-11-29 00:30:28,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 00:30:28,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:30:28,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:30:28,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:30:28,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:30:28,561 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 00:30:28,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:30:28,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:30:28,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:30:28,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:30:28,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:30:28,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:30:28,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:30:28,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:30:28,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:30:28,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:30:28,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:30:28,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:30:28,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:30:28,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:30:28,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:30:28,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:30:28,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:30:28,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:30:28,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:30:28,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:30:28,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:30:28,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:30:28,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:30:28,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:30:28,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:30:28,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:30:28,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:28,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:30:29,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:29,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:30:29,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:29,152 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 11 [2023-11-29 00:30:29,168 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 00:30:29,169 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 00:30:29,225 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-29 00:30:29,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-11-29 00:30:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 00:30:29,371 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:30:29,371 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:30:29,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509140224] [2023-11-29 00:30:29,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509140224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:30:29,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:30:29,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:30:29,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858393974] [2023-11-29 00:30:29,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:30:29,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:30:29,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:30:29,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:30:29,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:30:30,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 80 [2023-11-29 00:30:30,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 254 transitions, 2917 flow. Second operand has 6 states, 6 states have (on average 43.333333333333336) internal successors, (260), 6 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 00:30:30,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:30:30,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 80 [2023-11-29 00:30:30,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:30:33,695 INFO L124 PetriNetUnfolderBase]: 10118/17860 cut-off events. [2023-11-29 00:30:33,695 INFO L125 PetriNetUnfolderBase]: For 58477/62017 co-relation queries the response was YES. [2023-11-29 00:30:33,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66317 conditions, 17860 events. 10118/17860 cut-off events. For 58477/62017 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 140490 event pairs, 4596 based on Foata normal form. 392/17565 useless extension candidates. Maximal degree in co-relation 66257. Up to 8956 conditions per place. [2023-11-29 00:30:33,838 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 265 selfloop transitions, 50 changer transitions 0/336 dead transitions. [2023-11-29 00:30:33,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 336 transitions, 4073 flow [2023-11-29 00:30:33,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:30:33,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 00:30:33,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 355 transitions. [2023-11-29 00:30:33,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6339285714285714 [2023-11-29 00:30:33,839 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 355 transitions. [2023-11-29 00:30:33,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 355 transitions. [2023-11-29 00:30:33,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:30:33,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 355 transitions. [2023-11-29 00:30:33,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 50.714285714285715) internal successors, (355), 7 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 00:30:33,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 80.0) internal successors, (640), 8 states have internal predecessors, (640), 0 states have call successors, (0), 0 states 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 00:30:33,842 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 80.0) internal successors, (640), 8 states have internal predecessors, (640), 0 states have call successors, (0), 0 states 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 00:30:33,842 INFO L175 Difference]: Start difference. First operand has 201 places, 254 transitions, 2917 flow. Second operand 7 states and 355 transitions. [2023-11-29 00:30:33,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 336 transitions, 4073 flow [2023-11-29 00:30:34,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 336 transitions, 3908 flow, removed 7 selfloop flow, removed 10 redundant places. [2023-11-29 00:30:34,034 INFO L231 Difference]: Finished difference. Result has 199 places, 262 transitions, 2953 flow [2023-11-29 00:30:34,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=2760, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2953, PETRI_PLACES=199, PETRI_TRANSITIONS=262} [2023-11-29 00:30:34,034 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 119 predicate places. [2023-11-29 00:30:34,035 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 262 transitions, 2953 flow [2023-11-29 00:30:34,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 43.333333333333336) internal successors, (260), 6 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 00:30:34,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:30:34,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:30:34,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (22)] Ended with exit code 0 [2023-11-29 00:30:34,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:30:34,235 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:30:34,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:30:34,236 INFO L85 PathProgramCache]: Analyzing trace with hash 802535700, now seen corresponding path program 1 times [2023-11-29 00:30:34,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:30:34,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374796885] [2023-11-29 00:30:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:30:34,236 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 00:30:34,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:30:34,237 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:30:34,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (23)] Waiting until timeout for monitored process [2023-11-29 00:30:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:30:34,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 00:30:34,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:30:34,540 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 00:30:34,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:30:34,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:30:34,624 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 11 [2023-11-29 00:30:34,640 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 00:30:34,640 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 00:30:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:30:34,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:30:35,461 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:30:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:30:35,659 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:30:35,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374796885] [2023-11-29 00:30:35,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374796885] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:30:35,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:30:35,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 00:30:35,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467417603] [2023-11-29 00:30:35,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:30:35,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:30:35,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:30:35,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:30:35,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:30:40,654 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 00:30:45,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:30:46,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 00:30:50,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:30:56,164 WARN L539 Checker$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 00:31:01,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:31:05,191 WARN L539 Checker$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 00:31:09,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:31:13,320 WARN L539 Checker$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 00:31:17,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:31:21,682 WARN L539 Checker$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 00:31:23,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 00:31:30,169 WARN L539 Checker$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 00:31:30,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 80 [2023-11-29 00:31:30,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 262 transitions, 2953 flow. Second operand has 14 states, 14 states have (on average 33.42857142857143) internal successors, (468), 14 states have internal predecessors, (468), 0 states have call successors, (0), 0 states 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 00:31:30,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:31:30,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 80 [2023-11-29 00:31:30,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:31:40,823 INFO L124 PetriNetUnfolderBase]: 12522/21454 cut-off events. [2023-11-29 00:31:40,823 INFO L125 PetriNetUnfolderBase]: For 105413/115988 co-relation queries the response was YES. [2023-11-29 00:31:40,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85181 conditions, 21454 events. 12522/21454 cut-off events. For 105413/115988 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 166893 event pairs, 4130 based on Foata normal form. 134/19804 useless extension candidates. Maximal degree in co-relation 85118. Up to 5993 conditions per place. [2023-11-29 00:31:41,007 INFO L140 encePairwiseOnDemand]: 65/80 looper letters, 202 selfloop transitions, 171 changer transitions 0/403 dead transitions. [2023-11-29 00:31:41,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 403 transitions, 4626 flow [2023-11-29 00:31:41,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 00:31:41,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 00:31:41,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1096 transitions. [2023-11-29 00:31:41,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4724137931034483 [2023-11-29 00:31:41,011 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1096 transitions. [2023-11-29 00:31:41,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1096 transitions. [2023-11-29 00:31:41,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:31:41,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1096 transitions. [2023-11-29 00:31:41,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 37.793103448275865) internal successors, (1096), 29 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 00:31:41,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 80.0) internal successors, (2400), 30 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 00:31:41,015 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 80.0) internal successors, (2400), 30 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 00:31:41,016 INFO L175 Difference]: Start difference. First operand has 199 places, 262 transitions, 2953 flow. Second operand 29 states and 1096 transitions. [2023-11-29 00:31:41,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 403 transitions, 4626 flow [2023-11-29 00:31:41,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 403 transitions, 4502 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-11-29 00:31:41,419 INFO L231 Difference]: Finished difference. Result has 230 places, 277 transitions, 3406 flow [2023-11-29 00:31:41,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=2871, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3406, PETRI_PLACES=230, PETRI_TRANSITIONS=277} [2023-11-29 00:31:41,420 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 150 predicate places. [2023-11-29 00:31:41,420 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 277 transitions, 3406 flow [2023-11-29 00:31:41,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 33.42857142857143) internal successors, (468), 14 states have internal predecessors, (468), 0 states have call successors, (0), 0 states 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 00:31:41,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:31:41,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:31:41,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (23)] Ended with exit code 0 [2023-11-29 00:31:41,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:31:41,621 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:31:41,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:31:41,622 INFO L85 PathProgramCache]: Analyzing trace with hash -891196086, now seen corresponding path program 1 times [2023-11-29 00:31:41,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:31:41,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477250645] [2023-11-29 00:31:41,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:31:41,622 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 00:31:41,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:31:41,623 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:31:41,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (24)] Waiting until timeout for monitored process [2023-11-29 00:31:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:31:41,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:31:41,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:31:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:31:41,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:31:42,200 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 25 treesize of output 21 [2023-11-29 00:31:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:31:42,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:31:42,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477250645] [2023-11-29 00:31:42,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477250645] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:31:42,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:31:42,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-29 00:31:42,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126211241] [2023-11-29 00:31:42,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:31:42,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:31:42,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:31:42,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:31:42,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:31:44,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 80 [2023-11-29 00:31:44,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 277 transitions, 3406 flow. Second operand has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 00:31:44,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:31:44,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 80 [2023-11-29 00:31:44,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:31:49,366 INFO L124 PetriNetUnfolderBase]: 10990/20762 cut-off events. [2023-11-29 00:31:49,367 INFO L125 PetriNetUnfolderBase]: For 96738/104399 co-relation queries the response was YES. [2023-11-29 00:31:49,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84749 conditions, 20762 events. 10990/20762 cut-off events. For 96738/104399 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 177954 event pairs, 4802 based on Foata normal form. 1045/21180 useless extension candidates. Maximal degree in co-relation 84679. Up to 8885 conditions per place. [2023-11-29 00:31:49,559 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 238 selfloop transitions, 87 changer transitions 0/357 dead transitions. [2023-11-29 00:31:49,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 357 transitions, 4712 flow [2023-11-29 00:31:49,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:31:49,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 00:31:49,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 451 transitions. [2023-11-29 00:31:49,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7046875 [2023-11-29 00:31:49,562 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 451 transitions. [2023-11-29 00:31:49,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 451 transitions. [2023-11-29 00:31:49,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:31:49,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 451 transitions. [2023-11-29 00:31:49,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 56.375) internal successors, (451), 8 states have internal predecessors, (451), 0 states have call successors, (0), 0 states 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 00:31:49,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 80.0) internal successors, (720), 9 states have internal predecessors, (720), 0 states have call successors, (0), 0 states 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 00:31:49,564 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 80.0) internal successors, (720), 9 states have internal predecessors, (720), 0 states have call successors, (0), 0 states 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 00:31:49,564 INFO L175 Difference]: Start difference. First operand has 230 places, 277 transitions, 3406 flow. Second operand 8 states and 451 transitions. [2023-11-29 00:31:49,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 357 transitions, 4712 flow [2023-11-29 00:31:49,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 357 transitions, 4542 flow, removed 1 selfloop flow, removed 12 redundant places. [2023-11-29 00:31:49,923 INFO L231 Difference]: Finished difference. Result has 226 places, 281 transitions, 3498 flow [2023-11-29 00:31:49,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=3234, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3498, PETRI_PLACES=226, PETRI_TRANSITIONS=281} [2023-11-29 00:31:49,924 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 146 predicate places. [2023-11-29 00:31:49,924 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 281 transitions, 3498 flow [2023-11-29 00:31:49,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 00:31:49,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:31:49,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:31:49,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (24)] Ended with exit code 0 [2023-11-29 00:31:50,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:31:50,125 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:31:50,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:31:50,125 INFO L85 PathProgramCache]: Analyzing trace with hash -891196087, now seen corresponding path program 1 times [2023-11-29 00:31:50,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:31:50,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112139238] [2023-11-29 00:31:50,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:31:50,126 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 00:31:50,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:31:50,127 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:31:50,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (25)] Waiting until timeout for monitored process [2023-11-29 00:31:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:31:50,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:31:50,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:31:50,296 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 00:31:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:31:50,335 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:31:50,335 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:31:50,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112139238] [2023-11-29 00:31:50,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112139238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:31:50,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:31:50,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:31:50,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194797964] [2023-11-29 00:31:50,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:31:50,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:31:50,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:31:50,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:31:50,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:31:50,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 80 [2023-11-29 00:31:50,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 281 transitions, 3498 flow. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 00:31:50,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:31:50,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 80 [2023-11-29 00:31:50,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:31:54,428 INFO L124 PetriNetUnfolderBase]: 9858/18080 cut-off events. [2023-11-29 00:31:54,428 INFO L125 PetriNetUnfolderBase]: For 93385/100122 co-relation queries the response was YES. [2023-11-29 00:31:54,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82424 conditions, 18080 events. 9858/18080 cut-off events. For 93385/100122 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 146574 event pairs, 7196 based on Foata normal form. 1996/19924 useless extension candidates. Maximal degree in co-relation 82352. Up to 13656 conditions per place. [2023-11-29 00:31:54,594 INFO L140 encePairwiseOnDemand]: 76/80 looper letters, 229 selfloop transitions, 19 changer transitions 0/279 dead transitions. [2023-11-29 00:31:54,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 279 transitions, 3990 flow [2023-11-29 00:31:54,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:31:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:31:54,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 201 transitions. [2023-11-29 00:31:54,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2023-11-29 00:31:54,596 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 201 transitions. [2023-11-29 00:31:54,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 201 transitions. [2023-11-29 00:31:54,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:31:54,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 201 transitions. [2023-11-29 00:31:54,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:31:54,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 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 00:31:54,598 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 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 00:31:54,598 INFO L175 Difference]: Start difference. First operand has 226 places, 281 transitions, 3498 flow. Second operand 4 states and 201 transitions. [2023-11-29 00:31:54,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 279 transitions, 3990 flow [2023-11-29 00:31:54,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 279 transitions, 3864 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-29 00:31:54,851 INFO L231 Difference]: Finished difference. Result has 222 places, 279 transitions, 3406 flow [2023-11-29 00:31:54,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3406, PETRI_PLACES=222, PETRI_TRANSITIONS=279} [2023-11-29 00:31:54,851 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 142 predicate places. [2023-11-29 00:31:54,851 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 279 transitions, 3406 flow [2023-11-29 00:31:54,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 00:31:54,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:31:54,852 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:31:54,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (25)] Ended with exit code 0 [2023-11-29 00:31:55,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:31:55,052 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:31:55,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:31:55,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1690133224, now seen corresponding path program 2 times [2023-11-29 00:31:55,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:31:55,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559313619] [2023-11-29 00:31:55,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:31:55,053 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 00:31:55,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:31:55,054 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:31:55,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (26)] Waiting until timeout for monitored process [2023-11-29 00:31:55,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:31:55,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:31:55,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 00:31:55,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:31:55,264 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 00:31:55,268 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 00:31:55,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:31:55,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:31:55,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:31:55,298 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 00:31:55,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:31:55,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:31:55,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:31:55,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:31:55,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:31:55,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 00:31:55,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:31:55,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:31:55,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:31:55,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:31:55,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:31:55,481 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 00:31:55,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:31:55,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:31:55,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:31:55,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:31:55,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:31:55,535 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 00:31:55,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:31:55,649 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-11-29 00:31:55,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-11-29 00:31:55,655 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 00:31:55,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:31:55,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 00:31:55,810 INFO L349 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-11-29 00:31:55,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-11-29 00:31:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 00:31:55,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:31:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 00:31:57,379 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:31:57,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559313619] [2023-11-29 00:31:57,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559313619] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:31:57,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:31:57,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-11-29 00:31:57,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868103377] [2023-11-29 00:31:57,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:31:57,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:31:57,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:31:57,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:31:57,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:32:01,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 00:32:05,444 WARN L539 Checker$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 00:32:10,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:32:14,181 WARN L539 Checker$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 00:32:19,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 00:32:23,400 WARN L539 Checker$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 00:32:27,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:32:28,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 00:32:29,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:32:31,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:32:35,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:32:39,965 WARN L539 Checker$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 00:32:41,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 00:32:45,551 WARN L539 Checker$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 00:32:47,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:32:51,242 WARN L539 Checker$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 00:32:53,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:32:58,325 WARN L539 Checker$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 00:33:00,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:33:03,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:33:07,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:33:09,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 00:33:14,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:33:18,547 WARN L539 Checker$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 00:33:22,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:33:26,767 WARN L539 Checker$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 00:33:30,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:33:34,995 WARN L539 Checker$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 00:33:39,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:33:43,488 WARN L539 Checker$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 00:33:47,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:33:50,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:33:54,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:33:56,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:34:00,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:34:05,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 00:34:09,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:34:11,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:34:15,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:34:17,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:34:21,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 00:34:25,298 WARN L539 Checker$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 00:34:29,867 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 00:34:29,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 80 [2023-11-29 00:34:29,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 279 transitions, 3406 flow. Second operand has 16 states, 16 states have (on average 15.125) internal successors, (242), 16 states have internal predecessors, (242), 0 states have call successors, (0), 0 states 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 00:34:29,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:34:29,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 80 [2023-11-29 00:34:29,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:34:45,034 INFO L124 PetriNetUnfolderBase]: 31014/47420 cut-off events. [2023-11-29 00:34:45,034 INFO L125 PetriNetUnfolderBase]: For 242732/249590 co-relation queries the response was YES. [2023-11-29 00:34:45,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220114 conditions, 47420 events. 31014/47420 cut-off events. For 242732/249590 co-relation queries the response was YES. Maximal size of possible extension queue 1313. Compared 347327 event pairs, 14473 based on Foata normal form. 1134/47101 useless extension candidates. Maximal degree in co-relation 220043. Up to 24022 conditions per place. [2023-11-29 00:34:45,714 INFO L140 encePairwiseOnDemand]: 69/80 looper letters, 331 selfloop transitions, 83 changer transitions 0/421 dead transitions. [2023-11-29 00:34:45,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 421 transitions, 5349 flow [2023-11-29 00:34:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:34:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 00:34:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 293 transitions. [2023-11-29 00:34:45,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33295454545454545 [2023-11-29 00:34:45,717 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 293 transitions. [2023-11-29 00:34:45,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 293 transitions. [2023-11-29 00:34:45,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:34:45,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 293 transitions. [2023-11-29 00:34:45,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 26.636363636363637) internal successors, (293), 11 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 00:34:45,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 80.0) internal successors, (960), 12 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 00:34:45,719 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 80.0) internal successors, (960), 12 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 00:34:45,719 INFO L175 Difference]: Start difference. First operand has 222 places, 279 transitions, 3406 flow. Second operand 11 states and 293 transitions. [2023-11-29 00:34:45,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 421 transitions, 5349 flow [2023-11-29 00:34:48,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 421 transitions, 5328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:34:48,080 INFO L231 Difference]: Finished difference. Result has 233 places, 285 transitions, 3682 flow [2023-11-29 00:34:48,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3682, PETRI_PLACES=233, PETRI_TRANSITIONS=285} [2023-11-29 00:34:48,081 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 153 predicate places. [2023-11-29 00:34:48,081 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 285 transitions, 3682 flow [2023-11-29 00:34:48,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.125) internal successors, (242), 16 states have internal predecessors, (242), 0 states have call successors, (0), 0 states 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 00:34:48,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:34:48,081 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2023-11-29 00:34:48,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (26)] Ended with exit code 0 [2023-11-29 00:34:48,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:34:48,282 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:34:48,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:34:48,282 INFO L85 PathProgramCache]: Analyzing trace with hash -421088949, now seen corresponding path program 3 times [2023-11-29 00:34:48,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:34:48,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708092917] [2023-11-29 00:34:48,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:34:48,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:34:48,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:34:48,284 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:34:48,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (27)] Waiting until timeout for monitored process [2023-11-29 00:34:48,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 00:34:48,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:34:48,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 00:34:48,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:34:48,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 00:34:48,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:34:48,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:34:48,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:34:48,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:34:48,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:34:48,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:34:48,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:34:48,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:34:48,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:34:48,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:34:48,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:34:48,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:34:48,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:34:48,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:34:48,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:34:48,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:34:48,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:34:48,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:34:48,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:34:48,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:34:48,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:34:48,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:34:48,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:34:48,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:34:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:34:49,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:34:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:34:52,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:34:52,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708092917] [2023-11-29 00:34:52,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708092917] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:34:52,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:34:52,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-11-29 00:34:52,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131105953] [2023-11-29 00:34:52,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:34:52,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 00:34:52,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:34:52,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 00:34:52,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:35:14,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2023-11-29 00:35:14,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 285 transitions, 3682 flow. Second operand has 26 states, 26 states have (on average 45.76923076923077) internal successors, (1190), 26 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states 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 00:35:14,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:14,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2023-11-29 00:35:14,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:41,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:35:45,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:35:49,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:35:53,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:35:57,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:01,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:05,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:09,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:13,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:17,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:23,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:30,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:34,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:38,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:42,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:46,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:49,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:53,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:57,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:01,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:05,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:11,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:14,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:19,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:21,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:26,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:28,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:32,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:34,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:37,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:41,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:44,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:45,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:45,839 INFO L124 PetriNetUnfolderBase]: 11322/20427 cut-off events. [2023-11-29 00:37:45,839 INFO L125 PetriNetUnfolderBase]: For 147235/155607 co-relation queries the response was YES. [2023-11-29 00:37:46,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101597 conditions, 20427 events. 11322/20427 cut-off events. For 147235/155607 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 165142 event pairs, 8057 based on Foata normal form. 118/20301 useless extension candidates. Maximal degree in co-relation 101523. Up to 15453 conditions per place. [2023-11-29 00:37:46,173 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 119 selfloop transitions, 265 changer transitions 0/412 dead transitions. [2023-11-29 00:37:46,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 412 transitions, 6528 flow [2023-11-29 00:37:46,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-29 00:37:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-11-29 00:37:46,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 2744 transitions. [2023-11-29 00:37:46,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6017543859649123 [2023-11-29 00:37:46,178 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 2744 transitions. [2023-11-29 00:37:46,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 2744 transitions. [2023-11-29 00:37:46,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:37:46,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 2744 transitions. [2023-11-29 00:37:46,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 48.14035087719298) internal successors, (2744), 57 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states 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 00:37:46,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 80.0) internal successors, (4640), 58 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states 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 00:37:46,188 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 80.0) internal successors, (4640), 58 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states 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 00:37:46,188 INFO L175 Difference]: Start difference. First operand has 233 places, 285 transitions, 3682 flow. Second operand 57 states and 2744 transitions. [2023-11-29 00:37:46,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 412 transitions, 6528 flow [2023-11-29 00:37:46,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 412 transitions, 6503 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-11-29 00:37:46,779 INFO L231 Difference]: Finished difference. Result has 307 places, 391 transitions, 6100 flow [2023-11-29 00:37:46,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=3657, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=6100, PETRI_PLACES=307, PETRI_TRANSITIONS=391} [2023-11-29 00:37:46,780 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 227 predicate places. [2023-11-29 00:37:46,780 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 391 transitions, 6100 flow [2023-11-29 00:37:46,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 45.76923076923077) internal successors, (1190), 26 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states 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 00:37:46,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:37:46,781 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:37:46,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (27)] Ended with exit code 0 [2023-11-29 00:37:46,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:37:46,981 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:37:46,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:37:46,982 INFO L85 PathProgramCache]: Analyzing trace with hash 720421356, now seen corresponding path program 3 times [2023-11-29 00:37:46,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:37:46,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552600428] [2023-11-29 00:37:46,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:37:46,982 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 00:37:46,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:37:46,983 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:37:46,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (28)] Waiting until timeout for monitored process [2023-11-29 00:37:47,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:37:47,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:37:47,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 00:37:47,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:37:47,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 00:37:47,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:37:47,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:37:47,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:37:47,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:37:47,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:37:47,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:37:47,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:37:47,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:37:47,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:37:47,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:37:47,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:37:47,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:37:47,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:37:47,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:37:47,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:37:47,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:37:47,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:37:47,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:37:47,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:37:47,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:37:47,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:37:47,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:37:47,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:37:47,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:37:47,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:37:47,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:37:47,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:37:47,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:37:47,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:37:47,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:37:47,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:47,792 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 11 [2023-11-29 00:37:47,821 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-11-29 00:37:47,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-11-29 00:37:48,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:48,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 00:37:48,032 INFO L349 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-11-29 00:37:48,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-11-29 00:37:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 00:37:48,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:37:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 00:37:50,758 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:37:50,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552600428] [2023-11-29 00:37:50,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552600428] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:37:50,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:37:50,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-11-29 00:37:50,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768076940] [2023-11-29 00:37:50,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:37:50,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:37:50,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:37:50,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:37:50,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:37:55,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:38:00,830 WARN L539 Checker$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 00:38:06,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:38:12,342 WARN L539 Checker$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 00:38:19,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:38:23,893 WARN L539 Checker$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 00:38:29,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:38:34,053 WARN L539 Checker$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 00:38:34,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 80 [2023-11-29 00:38:34,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 391 transitions, 6100 flow. Second operand has 16 states, 16 states have (on average 23.375) internal successors, (374), 16 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 00:38:34,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:38:34,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 80 [2023-11-29 00:38:34,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:38:53,318 INFO L124 PetriNetUnfolderBase]: 31998/46936 cut-off events. [2023-11-29 00:38:53,318 INFO L125 PetriNetUnfolderBase]: For 322536/351861 co-relation queries the response was YES. [2023-11-29 00:38:53,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234489 conditions, 46936 events. 31998/46936 cut-off events. For 322536/351861 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 313118 event pairs, 5030 based on Foata normal form. 1920/48852 useless extension candidates. Maximal degree in co-relation 234395. Up to 11367 conditions per place. [2023-11-29 00:38:54,083 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 898 selfloop transitions, 94 changer transitions 0/1005 dead transitions. [2023-11-29 00:38:54,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 1005 transitions, 13486 flow [2023-11-29 00:38:54,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 00:38:54,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 00:38:54,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 665 transitions. [2023-11-29 00:38:54,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4618055555555556 [2023-11-29 00:38:54,087 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 665 transitions. [2023-11-29 00:38:54,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 665 transitions. [2023-11-29 00:38:54,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:38:54,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 665 transitions. [2023-11-29 00:38:54,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 36.94444444444444) internal successors, (665), 18 states have internal predecessors, (665), 0 states have call successors, (0), 0 states 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 00:38:54,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 80.0) internal successors, (1520), 19 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states 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 00:38:54,090 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 80.0) internal successors, (1520), 19 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states 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 00:38:54,090 INFO L175 Difference]: Start difference. First operand has 307 places, 391 transitions, 6100 flow. Second operand 18 states and 665 transitions. [2023-11-29 00:38:54,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 1005 transitions, 13486 flow [2023-11-29 00:38:55,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 1005 transitions, 12985 flow, removed 95 selfloop flow, removed 20 redundant places. [2023-11-29 00:38:55,433 INFO L231 Difference]: Finished difference. Result has 308 places, 405 transitions, 5959 flow [2023-11-29 00:38:55,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=5599, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5959, PETRI_PLACES=308, PETRI_TRANSITIONS=405} [2023-11-29 00:38:55,434 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 228 predicate places. [2023-11-29 00:38:55,434 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 405 transitions, 5959 flow [2023-11-29 00:38:55,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 23.375) internal successors, (374), 16 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 00:38:55,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:38:55,434 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:38:55,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (28)] Forceful destruction successful, exit code 0 [2023-11-29 00:38:55,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:38:55,635 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:38:55,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:38:55,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1829082632, now seen corresponding path program 2 times [2023-11-29 00:38:55,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:38:55,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277083210] [2023-11-29 00:38:55,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:38:55,635 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 00:38:55,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:38:55,636 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:38:55,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (29)] Waiting until timeout for monitored process [2023-11-29 00:38:55,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:38:55,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:38:55,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:38:55,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:38:55,867 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 00:38:55,877 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 00:38:55,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:38:55,969 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 00:38:55,978 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 00:38:55,979 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 00:38:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 00:38:56,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:38:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 00:38:57,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:38:57,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277083210] [2023-11-29 00:38:57,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277083210] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:38:57,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:38:57,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-29 00:38:57,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134213336] [2023-11-29 00:38:57,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:38:57,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:38:57,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:38:57,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:38:57,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:39:03,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:39:10,057 WARN L539 Checker$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 00:39:21,046 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 00:39:21,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 80 [2023-11-29 00:39:21,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 405 transitions, 5959 flow. Second operand has 14 states, 14 states have (on average 39.357142857142854) internal successors, (551), 14 states have internal predecessors, (551), 0 states have call successors, (0), 0 states 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 00:39:21,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:21,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 80 [2023-11-29 00:39:21,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:34,608 INFO L124 PetriNetUnfolderBase]: 27969/44908 cut-off events. [2023-11-29 00:39:34,608 INFO L125 PetriNetUnfolderBase]: For 411383/427417 co-relation queries the response was YES. [2023-11-29 00:39:35,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243710 conditions, 44908 events. 27969/44908 cut-off events. For 411383/427417 co-relation queries the response was YES. Maximal size of possible extension queue 1150. Compared 345714 event pairs, 11293 based on Foata normal form. 4/43149 useless extension candidates. Maximal degree in co-relation 243611. Up to 21435 conditions per place. [2023-11-29 00:39:35,304 INFO L140 encePairwiseOnDemand]: 69/80 looper letters, 398 selfloop transitions, 113 changer transitions 0/543 dead transitions. [2023-11-29 00:39:35,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 543 transitions, 8570 flow [2023-11-29 00:39:35,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:39:35,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 00:39:35,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 518 transitions. [2023-11-29 00:39:35,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5886363636363636 [2023-11-29 00:39:35,306 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 518 transitions. [2023-11-29 00:39:35,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 518 transitions. [2023-11-29 00:39:35,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:35,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 518 transitions. [2023-11-29 00:39:35,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 47.09090909090909) internal successors, (518), 11 states have internal predecessors, (518), 0 states have call successors, (0), 0 states 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 00:39:35,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 80.0) internal successors, (960), 12 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 00:39:35,308 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 80.0) internal successors, (960), 12 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 00:39:35,308 INFO L175 Difference]: Start difference. First operand has 308 places, 405 transitions, 5959 flow. Second operand 11 states and 518 transitions. [2023-11-29 00:39:35,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 543 transitions, 8570 flow [2023-11-29 00:39:36,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 543 transitions, 8141 flow, removed 147 selfloop flow, removed 5 redundant places. [2023-11-29 00:39:36,465 INFO L231 Difference]: Finished difference. Result has 314 places, 408 transitions, 6012 flow [2023-11-29 00:39:36,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=5746, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6012, PETRI_PLACES=314, PETRI_TRANSITIONS=408} [2023-11-29 00:39:36,466 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 234 predicate places. [2023-11-29 00:39:36,466 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 408 transitions, 6012 flow [2023-11-29 00:39:36,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 39.357142857142854) internal successors, (551), 14 states have internal predecessors, (551), 0 states have call successors, (0), 0 states 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 00:39:36,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:36,467 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:36,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (29)] Ended with exit code 0 [2023-11-29 00:39:36,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:39:36,667 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:39:36,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:36,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1866211484, now seen corresponding path program 1 times [2023-11-29 00:39:36,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:39:36,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547391815] [2023-11-29 00:39:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:36,668 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 00:39:36,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:39:36,669 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:39:36,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (30)] Waiting until timeout for monitored process [2023-11-29 00:39:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:36,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:39:36,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:39:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:39:37,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:39:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:39:37,364 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:39:37,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547391815] [2023-11-29 00:39:37,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547391815] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:39:37,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:39:37,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-29 00:39:37,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932097556] [2023-11-29 00:39:37,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:39:37,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:39:37,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:39:37,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:39:37,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:39:38,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 80 [2023-11-29 00:39:38,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 408 transitions, 6012 flow. Second operand has 14 states, 14 states have (on average 49.0) internal successors, (686), 14 states have internal predecessors, (686), 0 states have call successors, (0), 0 states 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 00:39:38,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:38,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 80 [2023-11-29 00:39:38,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:47,683 INFO L124 PetriNetUnfolderBase]: 23564/36430 cut-off events. [2023-11-29 00:39:47,683 INFO L125 PetriNetUnfolderBase]: For 304041/331674 co-relation queries the response was YES. [2023-11-29 00:39:48,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186439 conditions, 36430 events. 23564/36430 cut-off events. For 304041/331674 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 259308 event pairs, 13426 based on Foata normal form. 416/36152 useless extension candidates. Maximal degree in co-relation 186339. Up to 24982 conditions per place. [2023-11-29 00:39:48,247 INFO L140 encePairwiseOnDemand]: 66/80 looper letters, 187 selfloop transitions, 260 changer transitions 0/481 dead transitions. [2023-11-29 00:39:48,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 481 transitions, 7494 flow [2023-11-29 00:39:48,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:39:48,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 00:39:48,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 767 transitions. [2023-11-29 00:39:48,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6848214285714286 [2023-11-29 00:39:48,250 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 767 transitions. [2023-11-29 00:39:48,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 767 transitions. [2023-11-29 00:39:48,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:48,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 767 transitions. [2023-11-29 00:39:48,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 54.785714285714285) internal successors, (767), 14 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 00:39:48,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 80.0) internal successors, (1200), 15 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 00:39:48,253 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 80.0) internal successors, (1200), 15 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 00:39:48,253 INFO L175 Difference]: Start difference. First operand has 314 places, 408 transitions, 6012 flow. Second operand 14 states and 767 transitions. [2023-11-29 00:39:48,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 481 transitions, 7494 flow [2023-11-29 00:39:49,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 481 transitions, 7298 flow, removed 8 selfloop flow, removed 9 redundant places. [2023-11-29 00:39:49,320 INFO L231 Difference]: Finished difference. Result has 320 places, 409 transitions, 6409 flow [2023-11-29 00:39:49,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=5792, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6409, PETRI_PLACES=320, PETRI_TRANSITIONS=409} [2023-11-29 00:39:49,321 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 240 predicate places. [2023-11-29 00:39:49,322 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 409 transitions, 6409 flow [2023-11-29 00:39:49,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 49.0) internal successors, (686), 14 states have internal predecessors, (686), 0 states have call successors, (0), 0 states 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 00:39:49,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:49,322 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:49,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (30)] Ended with exit code 0 [2023-11-29 00:39:49,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:39:49,523 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:39:49,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:49,523 INFO L85 PathProgramCache]: Analyzing trace with hash 307668127, now seen corresponding path program 2 times [2023-11-29 00:39:49,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:39:49,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441122321] [2023-11-29 00:39:49,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:39:49,524 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 00:39:49,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:39:49,524 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:39:49,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (31)] Waiting until timeout for monitored process [2023-11-29 00:39:49,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 00:39:49,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:39:49,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:39:49,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:39:49,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 00:39:49,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-29 00:39:49,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:49,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:39:49,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:49,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:49,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:49,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:39:49,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:49,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:49,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:49,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:39:49,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:49,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:49,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:49,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:39:49,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:49,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:49,861 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 00:39:49,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:49,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:39:49,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:49,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:49,889 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 00:39:49,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:49,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:39:49,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:49,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:49,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:49,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:39:49,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:49,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:49,949 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 00:39:49,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:49,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:39:49,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:49,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:49,974 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 00:39:49,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:49,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:39:49,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:49,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:50,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:50,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:39:50,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:50,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:50,027 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 00:39:50,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:50,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:39:50,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:50,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:50,054 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 00:39:50,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:50,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:39:50,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:50,190 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 11 [2023-11-29 00:39:50,200 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 00:39:50,201 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 00:39:50,259 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-29 00:39:50,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-11-29 00:39:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 00:39:50,453 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:39:50,453 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:39:50,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441122321] [2023-11-29 00:39:50,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441122321] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:50,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:50,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:39:50,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679515990] [2023-11-29 00:39:50,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:50,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:39:50,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:39:50,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:39:50,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:39:51,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 80 [2023-11-29 00:39:51,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 409 transitions, 6409 flow. Second operand has 6 states, 6 states have (on average 44.0) internal successors, (264), 6 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 00:39:51,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:51,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 80 [2023-11-29 00:39:51,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:40:02,139 INFO L124 PetriNetUnfolderBase]: 28564/41973 cut-off events. [2023-11-29 00:40:02,139 INFO L125 PetriNetUnfolderBase]: For 329625/361384 co-relation queries the response was YES. [2023-11-29 00:40:02,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213628 conditions, 41973 events. 28564/41973 cut-off events. For 329625/361384 co-relation queries the response was YES. Maximal size of possible extension queue 1020. Compared 278227 event pairs, 10977 based on Foata normal form. 670/41856 useless extension candidates. Maximal degree in co-relation 213526. Up to 22318 conditions per place. [2023-11-29 00:40:02,785 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 401 selfloop transitions, 89 changer transitions 0/515 dead transitions. [2023-11-29 00:40:02,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 515 transitions, 8451 flow [2023-11-29 00:40:02,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:40:02,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 00:40:02,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 348 transitions. [2023-11-29 00:40:02,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2023-11-29 00:40:02,787 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 348 transitions. [2023-11-29 00:40:02,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 348 transitions. [2023-11-29 00:40:02,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:40:02,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 348 transitions. [2023-11-29 00:40:02,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 49.714285714285715) internal successors, (348), 7 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:02,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 80.0) internal successors, (640), 8 states have internal predecessors, (640), 0 states have call successors, (0), 0 states 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 00:40:02,789 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 80.0) internal successors, (640), 8 states have internal predecessors, (640), 0 states have call successors, (0), 0 states 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 00:40:02,789 INFO L175 Difference]: Start difference. First operand has 320 places, 409 transitions, 6409 flow. Second operand 7 states and 348 transitions. [2023-11-29 00:40:02,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 515 transitions, 8451 flow [2023-11-29 00:40:04,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 515 transitions, 7936 flow, removed 7 selfloop flow, removed 10 redundant places. [2023-11-29 00:40:04,490 INFO L231 Difference]: Finished difference. Result has 318 places, 421 transitions, 6260 flow [2023-11-29 00:40:04,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=5894, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6260, PETRI_PLACES=318, PETRI_TRANSITIONS=421} [2023-11-29 00:40:04,491 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 238 predicate places. [2023-11-29 00:40:04,491 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 421 transitions, 6260 flow [2023-11-29 00:40:04,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.0) internal successors, (264), 6 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 00:40:04,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:40:04,491 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:04,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (31)] Ended with exit code 0 [2023-11-29 00:40:04,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:40:04,692 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 00:40:04,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:04,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1106816460, now seen corresponding path program 3 times [2023-11-29 00:40:04,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:40:04,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339101975] [2023-11-29 00:40:04,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:40:04,693 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 00:40:04,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:40:04,694 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 00:40:04,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7cea35-c10e-4cc1-9371-c9f627150d2f/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 (32)] Waiting until timeout for monitored process [2023-11-29 00:40:04,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:40:04,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:40:04,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 00:40:04,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:04,997 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 00:40:05,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:40:05,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:05,105 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 11 [2023-11-29 00:40:05,125 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 00:40:05,125 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 00:40:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 00:40:05,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:40:06,991 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:40:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 00:40:07,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:40:07,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339101975] [2023-11-29 00:40:07,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339101975] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:40:07,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:40:07,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-11-29 00:40:07,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017925631] [2023-11-29 00:40:07,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:40:07,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:40:07,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:40:07,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:40:07,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:40:11,832 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 00:40:16,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:40:22,905 WARN L539 Checker$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 00:40:27,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:40:32,150 WARN L539 Checker$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 00:40:36,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:40:42,955 WARN L539 Checker$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 00:40:47,532 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 00:40:47,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 80 [2023-11-29 00:40:47,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 421 transitions, 6260 flow. Second operand has 16 states, 16 states have (on average 36.5) internal successors, (584), 16 states have internal predecessors, (584), 0 states have call successors, (0), 0 states 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 00:40:47,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:40:47,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 80 [2023-11-29 00:40:47,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand