./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu --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 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:38:28,468 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:38:28,540 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:38:28,546 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:38:28,547 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:38:28,573 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:38:28,574 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:38:28,574 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:38:28,575 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:38:28,576 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:38:28,576 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:38:28,577 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:38:28,578 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:38:28,578 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:38:28,579 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:38:28,580 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:38:28,580 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:38:28,581 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:38:28,582 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:38:28,582 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:38:28,583 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:38:28,584 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:38:28,584 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:38:28,585 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:38:28,585 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:38:28,586 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:38:28,587 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:38:28,587 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:38:28,588 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:38:28,588 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:38:28,589 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:38:28,589 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:38:28,590 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:38:28,590 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:38:28,591 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:38:28,591 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:38:28,592 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:38:28,592 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:38:28,592 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_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 [2023-11-19 07:38:28,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:38:28,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:38:28,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:38:28,893 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:38:28,894 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:38:28,895 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2023-11-19 07:38:32,130 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:38:32,370 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:38:32,371 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2023-11-19 07:38:32,381 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/data/396f355af/4704200d7aa44b439c852f7d22c1c63c/FLAG718b7d24d [2023-11-19 07:38:32,394 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/data/396f355af/4704200d7aa44b439c852f7d22c1c63c [2023-11-19 07:38:32,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:38:32,399 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:38:32,400 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:38:32,401 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:38:32,405 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:38:32,406 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:38:32" (1/1) ... [2023-11-19 07:38:32,408 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@627655e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:32, skipping insertion in model container [2023-11-19 07:38:32,408 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:38:32" (1/1) ... [2023-11-19 07:38:32,435 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:38:32,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:38:32,644 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) [2023-11-19 07:38:32,644 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@138c2e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:32, skipping insertion in model container [2023-11-19 07:38:32,645 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:38:32,645 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-19 07:38:32,647 INFO L158 Benchmark]: Toolchain (without parser) took 247.13ms. Allocated memory is still 186.6MB. Free memory was 142.6MB in the beginning and 132.5MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 07:38:32,648 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 113.2MB. Free memory was 63.6MB in the beginning and 63.5MB in the end (delta: 134.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:38:32,649 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.45ms. Allocated memory is still 186.6MB. Free memory was 142.4MB in the beginning and 132.5MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 07:38:32,651 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 113.2MB. Free memory was 63.6MB in the beginning and 63.5MB in the end (delta: 134.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 244.45ms. Allocated memory is still 186.6MB. Free memory was 142.4MB in the beginning and 132.5MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 125]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu --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 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:38:35,217 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:38:35,335 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-19 07:38:35,344 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:38:35,347 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:38:35,392 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:38:35,393 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:38:35,393 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:38:35,394 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:38:35,399 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:38:35,400 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:38:35,401 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:38:35,401 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:38:35,403 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:38:35,403 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:38:35,404 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:38:35,404 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:38:35,405 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:38:35,405 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:38:35,406 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:38:35,406 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:38:35,407 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:38:35,407 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:38:35,408 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-19 07:38:35,408 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-19 07:38:35,409 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:38:35,409 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:38:35,410 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:38:35,410 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:38:35,411 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:38:35,412 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:38:35,412 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:38:35,413 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:38:35,413 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:38:35,413 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-19 07:38:35,414 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-19 07:38:35,414 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:38:35,414 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:38:35,414 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:38:35,416 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-19 07:38:35,416 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:38:35,416 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_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 [2023-11-19 07:38:35,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:38:35,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:38:35,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:38:35,878 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:38:35,878 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:38:35,880 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2023-11-19 07:38:38,960 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:38:39,233 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:38:39,234 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2023-11-19 07:38:39,244 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/data/9625f8459/7f29e58ee8bc4290aca02b48e997a480/FLAG216aa40ff [2023-11-19 07:38:39,260 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/data/9625f8459/7f29e58ee8bc4290aca02b48e997a480 [2023-11-19 07:38:39,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:38:39,265 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:38:39,267 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:38:39,267 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:38:39,277 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:38:39,278 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:38:39" (1/1) ... [2023-11-19 07:38:39,279 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@778681e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:39, skipping insertion in model container [2023-11-19 07:38:39,280 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:38:39" (1/1) ... [2023-11-19 07:38:39,313 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:38:39,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:38:39,552 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-19 07:38:39,570 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:38:39,614 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:38:39,626 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:38:39,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:38:39,683 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:38:39,683 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:38:39,696 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:38:39,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:39 WrapperNode [2023-11-19 07:38:39,697 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:38:39,699 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:38:39,699 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:38:39,699 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:38:39,708 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:39" (1/1) ... [2023-11-19 07:38:39,736 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:39" (1/1) ... [2023-11-19 07:38:39,781 INFO L138 Inliner]: procedures = 27, calls = 51, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 171 [2023-11-19 07:38:39,781 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:38:39,783 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:38:39,783 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:38:39,783 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:38:39,793 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:39" (1/1) ... [2023-11-19 07:38:39,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:39" (1/1) ... [2023-11-19 07:38:39,816 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:39" (1/1) ... [2023-11-19 07:38:39,816 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:39" (1/1) ... [2023-11-19 07:38:39,826 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:39" (1/1) ... [2023-11-19 07:38:39,846 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:39" (1/1) ... [2023-11-19 07:38:39,849 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:39" (1/1) ... [2023-11-19 07:38:39,851 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:39" (1/1) ... [2023-11-19 07:38:39,854 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:38:39,855 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:38:39,856 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:38:39,856 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:38:39,857 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:39" (1/1) ... [2023-11-19 07:38:39,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:38:39,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:39,898 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:39,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:38:39,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:38:39,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-19 07:38:39,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:38:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-19 07:38:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:38:39,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:38:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:38:39,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:38:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:38:39,948 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:38:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:38:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:38:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:38:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:38:39,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:38:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:38:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-19 07:38:39,952 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:38:40,091 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:38:40,094 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:38:40,672 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:38:40,792 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:38:40,792 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:38:40,797 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:38:40 BoogieIcfgContainer [2023-11-19 07:38:40,797 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:38:40,800 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:38:40,800 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:38:40,804 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:38:40,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:38:39" (1/3) ... [2023-11-19 07:38:40,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bb66cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:38:40, skipping insertion in model container [2023-11-19 07:38:40,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:39" (2/3) ... [2023-11-19 07:38:40,806 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bb66cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:38:40, skipping insertion in model container [2023-11-19 07:38:40,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:38:40" (3/3) ... [2023-11-19 07:38:40,807 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2023-11-19 07:38:40,829 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:38:40,829 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-11-19 07:38:40,829 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:38:40,911 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:38:40,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 182 transitions, 385 flow [2023-11-19 07:38:41,029 INFO L124 PetriNetUnfolderBase]: 11/179 cut-off events. [2023-11-19 07:38:41,029 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:38:41,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 179 events. 11/179 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 182 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 135. Up to 3 conditions per place. [2023-11-19 07:38:41,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 182 transitions, 385 flow [2023-11-19 07:38:41,043 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 174 transitions, 366 flow [2023-11-19 07:38:41,047 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:38:41,057 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 174 transitions, 366 flow [2023-11-19 07:38:41,060 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 174 transitions, 366 flow [2023-11-19 07:38:41,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 174 transitions, 366 flow [2023-11-19 07:38:41,115 INFO L124 PetriNetUnfolderBase]: 11/174 cut-off events. [2023-11-19 07:38:41,116 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:38:41,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 174 events. 11/174 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 181 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 135. Up to 3 conditions per place. [2023-11-19 07:38:41,121 INFO L119 LiptonReduction]: Number of co-enabled transitions 1984 [2023-11-19 07:38:57,361 INFO L134 LiptonReduction]: Checked pairs total: 3838 [2023-11-19 07:38:57,362 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-11-19 07:38:57,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:38:57,387 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;@4f93625a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:38:57,387 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2023-11-19 07:38:57,391 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:38:57,391 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-19 07:38:57,391 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:38:57,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:57,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:38:57,393 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-19 07:38:57,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:57,399 INFO L85 PathProgramCache]: Analyzing trace with hash 23815, now seen corresponding path program 1 times [2023-11-19 07:38:57,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:38:57,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250519764] [2023-11-19 07:38:57,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:57,414 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 [2023-11-19 07:38:57,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:38:57,415 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:38:57,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:38:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:57,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:38:57,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:57,601 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 [2023-11-19 07:38:57,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 07:38:57,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,637 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 [2023-11-19 07:38:57,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,656 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 [2023-11-19 07:38:57,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,667 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 [2023-11-19 07:38:57,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,674 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 [2023-11-19 07:38:57,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,699 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 [2023-11-19 07:38:57,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,709 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 [2023-11-19 07:38:57,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,721 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 [2023-11-19 07:38:57,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,727 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 [2023-11-19 07:38:57,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,735 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 [2023-11-19 07:38:57,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,743 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 [2023-11-19 07:38:57,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,765 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 [2023-11-19 07:38:57,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,775 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 [2023-11-19 07:38:57,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,786 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 11 treesize of output 1 [2023-11-19 07:38:57,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,792 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 [2023-11-19 07:38:57,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,799 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 [2023-11-19 07:38:57,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,811 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 [2023-11-19 07:38:57,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,832 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 [2023-11-19 07:38:57,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,849 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 [2023-11-19 07:38:57,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,872 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 [2023-11-19 07:38:57,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,900 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 [2023-11-19 07:38:57,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,914 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 [2023-11-19 07:38:57,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:57,931 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 16 treesize of output 1 [2023-11-19 07:38:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:57,938 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:38:57,939 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:38:57,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250519764] [2023-11-19 07:38:57,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250519764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:57,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:57,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:38:57,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310247410] [2023-11-19 07:38:57,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:57,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:38:57,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:38:57,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:38:57,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:58,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 366 [2023-11-19 07:38:58,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:58,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:58,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 366 [2023-11-19 07:38:58,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:58,643 INFO L124 PetriNetUnfolderBase]: 988/1537 cut-off events. [2023-11-19 07:38:58,644 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2023-11-19 07:38:58,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3120 conditions, 1537 events. 988/1537 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6961 event pairs, 881 based on Foata normal form. 0/809 useless extension candidates. Maximal degree in co-relation 2832. Up to 1475 conditions per place. [2023-11-19 07:38:58,664 INFO L140 encePairwiseOnDemand]: 360/366 looper letters, 36 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2023-11-19 07:38:58,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 182 flow [2023-11-19 07:38:58,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:38:58,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:38:58,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-11-19 07:38:58,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45901639344262296 [2023-11-19 07:38:58,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-11-19 07:38:58,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-11-19 07:38:58,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:58,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-11-19 07:38:58,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:58,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:58,703 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:58,705 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 106 flow. Second operand 3 states and 504 transitions. [2023-11-19 07:38:58,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 182 flow [2023-11-19 07:38:58,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 170 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 07:38:58,714 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 98 flow [2023-11-19 07:38:58,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-11-19 07:38:58,720 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-11-19 07:38:58,721 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 98 flow [2023-11-19 07:38:58,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:58,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:58,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:38:58,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:38:58,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:38:58,924 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-19 07:38:58,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:58,925 INFO L85 PathProgramCache]: Analyzing trace with hash 23816, now seen corresponding path program 1 times [2023-11-19 07:38:58,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:38:58,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709157581] [2023-11-19 07:38:58,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:58,926 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 [2023-11-19 07:38:58,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:38:58,928 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:38:58,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:38:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:59,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:38:59,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:59,100 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 [2023-11-19 07:38:59,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,130 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 [2023-11-19 07:38:59,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,154 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 [2023-11-19 07:38:59,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,190 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 [2023-11-19 07:38:59,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,238 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 [2023-11-19 07:38:59,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,264 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 [2023-11-19 07:38:59,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,283 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 [2023-11-19 07:38:59,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,298 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 [2023-11-19 07:38:59,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,316 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 [2023-11-19 07:38:59,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,330 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 [2023-11-19 07:38:59,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,357 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 [2023-11-19 07:38:59,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,371 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 [2023-11-19 07:38:59,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,387 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 [2023-11-19 07:38:59,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,398 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 [2023-11-19 07:38:59,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,414 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 [2023-11-19 07:38:59,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,437 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 [2023-11-19 07:38:59,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,451 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 [2023-11-19 07:38:59,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:38:59,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,492 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 [2023-11-19 07:38:59,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,513 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 [2023-11-19 07:38:59,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,527 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 [2023-11-19 07:38:59,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,535 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:38:59,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,545 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 [2023-11-19 07:38:59,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:59,555 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 [2023-11-19 07:38:59,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:59,577 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:38:59,577 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:38:59,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709157581] [2023-11-19 07:38:59,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709157581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:59,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:59,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:38:59,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972934841] [2023-11-19 07:38:59,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:59,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:38:59,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:38:59,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:38:59,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:59,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 366 [2023-11-19 07:38:59,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:59,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:59,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 366 [2023-11-19 07:38:59,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:00,230 INFO L124 PetriNetUnfolderBase]: 991/1541 cut-off events. [2023-11-19 07:39:00,231 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:39:00,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3075 conditions, 1541 events. 991/1541 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6972 event pairs, 881 based on Foata normal form. 0/812 useless extension candidates. Maximal degree in co-relation 3045. Up to 1481 conditions per place. [2023-11-19 07:39:00,244 INFO L140 encePairwiseOnDemand]: 360/366 looper letters, 39 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-11-19 07:39:00,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 200 flow [2023-11-19 07:39:00,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:00,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:00,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-11-19 07:39:00,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45901639344262296 [2023-11-19 07:39:00,249 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-11-19 07:39:00,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-11-19 07:39:00,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:00,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-11-19 07:39:00,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:00,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:00,256 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:00,257 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 98 flow. Second operand 3 states and 504 transitions. [2023-11-19 07:39:00,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 200 flow [2023-11-19 07:39:00,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:39:00,259 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 123 flow [2023-11-19 07:39:00,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-11-19 07:39:00,260 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2023-11-19 07:39:00,261 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 123 flow [2023-11-19 07:39:00,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:00,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:00,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:39:00,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:00,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:00,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-19 07:39:00,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:00,466 INFO L85 PathProgramCache]: Analyzing trace with hash 740154, now seen corresponding path program 1 times [2023-11-19 07:39:00,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:00,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785115145] [2023-11-19 07:39:00,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:00,467 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 [2023-11-19 07:39:00,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:00,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:00,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:00,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:39:00,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:00,654 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-19 07:39:00,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 9 [2023-11-19 07:39:00,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:00,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:00,677 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 [2023-11-19 07:39:00,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:00,693 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 19 treesize of output 15 [2023-11-19 07:39:00,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:00,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:00,782 INFO L349 Elim1Store]: treesize reduction 19, result has 13.6 percent of original size [2023-11-19 07:39:00,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 3 [2023-11-19 07:39:00,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:00,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:00,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:00,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 07:39:00,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:00,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:00,834 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 [2023-11-19 07:39:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:00,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:01,031 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:01,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785115145] [2023-11-19 07:39:01,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785115145] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:01,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:39:01,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-11-19 07:39:01,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373368161] [2023-11-19 07:39:01,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:01,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:39:01,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:01,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:39:01,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:39:01,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 366 [2023-11-19 07:39:01,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:01,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:01,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 366 [2023-11-19 07:39:01,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:02,022 INFO L124 PetriNetUnfolderBase]: 822/1299 cut-off events. [2023-11-19 07:39:02,022 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:39:02,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2596 conditions, 1299 events. 822/1299 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5718 event pairs, 725 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 2565. Up to 1239 conditions per place. [2023-11-19 07:39:02,033 INFO L140 encePairwiseOnDemand]: 363/366 looper letters, 40 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-11-19 07:39:02,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 43 transitions, 194 flow [2023-11-19 07:39:02,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:02,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:02,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2023-11-19 07:39:02,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42987249544626593 [2023-11-19 07:39:02,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2023-11-19 07:39:02,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2023-11-19 07:39:02,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:02,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2023-11-19 07:39:02,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:02,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:02,044 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:02,045 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 123 flow. Second operand 3 states and 472 transitions. [2023-11-19 07:39:02,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 43 transitions, 194 flow [2023-11-19 07:39:02,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 188 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:02,047 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 108 flow [2023-11-19 07:39:02,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-11-19 07:39:02,048 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-11-19 07:39:02,048 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 108 flow [2023-11-19 07:39:02,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:02,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:02,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:39:02,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:02,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:02,252 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-19 07:39:02,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:02,253 INFO L85 PathProgramCache]: Analyzing trace with hash 740152, now seen corresponding path program 1 times [2023-11-19 07:39:02,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:02,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389848949] [2023-11-19 07:39:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:02,253 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 [2023-11-19 07:39:02,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:02,255 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:02,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:02,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:39:02,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:02,394 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:02,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-19 07:39:02,432 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-19 07:39:02,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-19 07:39:02,460 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:02,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-19 07:39:02,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:02,506 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-19 07:39:02,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2023-11-19 07:39:02,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:02,549 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-19 07:39:02,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2023-11-19 07:39:02,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:02,599 INFO L349 Elim1Store]: treesize reduction 60, result has 10.4 percent of original size [2023-11-19 07:39:02,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2023-11-19 07:39:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:39:02,709 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:02,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:02,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389848949] [2023-11-19 07:39:02,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389848949] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:02,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:02,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:39:02,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720084214] [2023-11-19 07:39:02,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:02,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:02,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:02,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:02,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:02,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 366 [2023-11-19 07:39:02,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:02,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:02,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 366 [2023-11-19 07:39:02,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:03,265 INFO L124 PetriNetUnfolderBase]: 653/1057 cut-off events. [2023-11-19 07:39:03,265 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:39:03,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2107 conditions, 1057 events. 653/1057 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4537 event pairs, 569 based on Foata normal form. 0/619 useless extension candidates. Maximal degree in co-relation 2099. Up to 997 conditions per place. [2023-11-19 07:39:03,275 INFO L140 encePairwiseOnDemand]: 363/366 looper letters, 37 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-11-19 07:39:03,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 174 flow [2023-11-19 07:39:03,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:03,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:03,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2023-11-19 07:39:03,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4471766848816029 [2023-11-19 07:39:03,278 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2023-11-19 07:39:03,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2023-11-19 07:39:03,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:03,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2023-11-19 07:39:03,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:03,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:03,285 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:03,286 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 108 flow. Second operand 3 states and 491 transitions. [2023-11-19 07:39:03,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 174 flow [2023-11-19 07:39:03,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:03,288 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 99 flow [2023-11-19 07:39:03,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-11-19 07:39:03,289 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -7 predicate places. [2023-11-19 07:39:03,289 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 99 flow [2023-11-19 07:39:03,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:03,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:03,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:39:03,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:03,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:03,493 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-19 07:39:03,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:03,494 INFO L85 PathProgramCache]: Analyzing trace with hash 740102, now seen corresponding path program 1 times [2023-11-19 07:39:03,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:03,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121081084] [2023-11-19 07:39:03,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:03,494 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 [2023-11-19 07:39:03,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:03,495 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:03,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:03,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:39:03,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:03,606 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 [2023-11-19 07:39:03,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,622 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 [2023-11-19 07:39:03,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,650 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 [2023-11-19 07:39:03,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,686 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 [2023-11-19 07:39:03,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,713 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 [2023-11-19 07:39:03,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,725 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 [2023-11-19 07:39:03,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,737 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 [2023-11-19 07:39:03,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,749 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 [2023-11-19 07:39:03,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,764 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 [2023-11-19 07:39:03,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,788 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 [2023-11-19 07:39:03,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,798 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 [2023-11-19 07:39:03,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,810 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 [2023-11-19 07:39:03,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,822 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 [2023-11-19 07:39:03,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,834 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 [2023-11-19 07:39:03,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,850 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 [2023-11-19 07:39:03,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,872 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 [2023-11-19 07:39:03,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:39:03,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,893 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 [2023-11-19 07:39:03,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,904 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 [2023-11-19 07:39:03,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,915 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 [2023-11-19 07:39:03,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,941 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 [2023-11-19 07:39:03,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,953 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 [2023-11-19 07:39:03,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,962 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 [2023-11-19 07:39:03,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:03,974 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 [2023-11-19 07:39:04,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:04,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:04,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:04,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121081084] [2023-11-19 07:39:04,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121081084] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:04,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:39:04,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-19 07:39:04,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608021223] [2023-11-19 07:39:04,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:04,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:39:04,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:04,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:39:04,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:39:05,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 366 [2023-11-19 07:39:05,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 99 flow. Second operand has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:05,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:05,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 366 [2023-11-19 07:39:05,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:05,862 INFO L124 PetriNetUnfolderBase]: 656/1063 cut-off events. [2023-11-19 07:39:05,863 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:39:05,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2126 conditions, 1063 events. 656/1063 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4583 event pairs, 569 based on Foata normal form. 0/622 useless extension candidates. Maximal degree in co-relation 2117. Up to 1000 conditions per place. [2023-11-19 07:39:05,871 INFO L140 encePairwiseOnDemand]: 362/366 looper letters, 35 selfloop transitions, 9 changer transitions 0/46 dead transitions. [2023-11-19 07:39:05,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 211 flow [2023-11-19 07:39:05,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:39:05,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:39:05,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 935 transitions. [2023-11-19 07:39:05,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257741347905282 [2023-11-19 07:39:05,877 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 935 transitions. [2023-11-19 07:39:05,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 935 transitions. [2023-11-19 07:39:05,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:05,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 935 transitions. [2023-11-19 07:39:05,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.83333333333334) internal successors, (935), 6 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:05,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 366.0) internal successors, (2562), 7 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:05,888 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 366.0) internal successors, (2562), 7 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:05,888 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 99 flow. Second operand 6 states and 935 transitions. [2023-11-19 07:39:05,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 211 flow [2023-11-19 07:39:05,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:05,891 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 159 flow [2023-11-19 07:39:05,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=159, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-11-19 07:39:05,893 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-11-19 07:39:05,894 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 159 flow [2023-11-19 07:39:05,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:05,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:05,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:39:05,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:06,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:06,098 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-19 07:39:06,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:06,099 INFO L85 PathProgramCache]: Analyzing trace with hash 22953148, now seen corresponding path program 1 times [2023-11-19 07:39:06,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:06,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430010387] [2023-11-19 07:39:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:06,100 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 [2023-11-19 07:39:06,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:06,101 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:06,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:06,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:39:06,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:06,223 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-19 07:39:06,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2023-11-19 07:39:06,246 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:06,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2023-11-19 07:39:06,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:06,299 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-19 07:39:06,299 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 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-19 07:39:06,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:06,332 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:06,333 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 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-19 07:39:06,364 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:06,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-19 07:39:06,397 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-19 07:39:06,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-19 07:39:06,420 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:06,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2023-11-19 07:39:06,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:06,455 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-19 07:39:06,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-19 07:39:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:06,605 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:06,605 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:06,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430010387] [2023-11-19 07:39:06,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430010387] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:06,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:06,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:39:06,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580599510] [2023-11-19 07:39:06,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:06,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:06,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:06,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:06,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:06,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 366 [2023-11-19 07:39:06,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:06,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:06,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 366 [2023-11-19 07:39:06,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:07,169 INFO L124 PetriNetUnfolderBase]: 634/1023 cut-off events. [2023-11-19 07:39:07,170 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-19 07:39:07,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2069 conditions, 1023 events. 634/1023 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4381 event pairs, 548 based on Foata normal form. 0/612 useless extension candidates. Maximal degree in co-relation 2056. Up to 963 conditions per place. [2023-11-19 07:39:07,180 INFO L140 encePairwiseOnDemand]: 363/366 looper letters, 41 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-11-19 07:39:07,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 44 transitions, 239 flow [2023-11-19 07:39:07,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:07,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:07,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-11-19 07:39:07,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453551912568306 [2023-11-19 07:39:07,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-11-19 07:39:07,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-11-19 07:39:07,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:07,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-11-19 07:39:07,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:07,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:07,190 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:07,190 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 159 flow. Second operand 3 states and 489 transitions. [2023-11-19 07:39:07,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 44 transitions, 239 flow [2023-11-19 07:39:07,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 44 transitions, 218 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:07,193 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 136 flow [2023-11-19 07:39:07,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-11-19 07:39:07,194 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2023-11-19 07:39:07,195 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 136 flow [2023-11-19 07:39:07,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:07,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:07,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:39:07,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:07,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:07,403 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-19 07:39:07,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash 22953147, now seen corresponding path program 1 times [2023-11-19 07:39:07,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:07,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749596450] [2023-11-19 07:39:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:07,404 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 [2023-11-19 07:39:07,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:07,406 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:07,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:07,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:39:07,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:07,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,545 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 [2023-11-19 07:39:07,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,576 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 [2023-11-19 07:39:07,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,632 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 [2023-11-19 07:39:07,642 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 [2023-11-19 07:39:07,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,663 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 [2023-11-19 07:39:07,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 07:39:07,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,700 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 [2023-11-19 07:39:07,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,736 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 [2023-11-19 07:39:07,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,753 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 [2023-11-19 07:39:07,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,781 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 [2023-11-19 07:39:07,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 07:39:07,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,838 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 21 treesize of output 5 [2023-11-19 07:39:07,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2023-11-19 07:39:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:07,928 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:07,928 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:07,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749596450] [2023-11-19 07:39:07,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749596450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:07,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:07,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:39:07,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493262630] [2023-11-19 07:39:07,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:07,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:07,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:07,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:07,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:08,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 366 [2023-11-19 07:39:08,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:08,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:08,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 366 [2023-11-19 07:39:08,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:08,358 INFO L124 PetriNetUnfolderBase]: 612/983 cut-off events. [2023-11-19 07:39:08,358 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-19 07:39:08,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1981 conditions, 983 events. 612/983 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4193 event pairs, 527 based on Foata normal form. 0/600 useless extension candidates. Maximal degree in co-relation 1967. Up to 923 conditions per place. [2023-11-19 07:39:08,368 INFO L140 encePairwiseOnDemand]: 363/366 looper letters, 39 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-11-19 07:39:08,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 42 transitions, 212 flow [2023-11-19 07:39:08,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:08,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:08,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-11-19 07:39:08,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4544626593806922 [2023-11-19 07:39:08,371 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-11-19 07:39:08,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-11-19 07:39:08,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:08,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-11-19 07:39:08,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:08,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:08,377 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:08,377 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 136 flow. Second operand 3 states and 499 transitions. [2023-11-19 07:39:08,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 42 transitions, 212 flow [2023-11-19 07:39:08,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 42 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:08,380 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 133 flow [2023-11-19 07:39:08,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2023-11-19 07:39:08,381 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2023-11-19 07:39:08,381 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 133 flow [2023-11-19 07:39:08,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:08,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:08,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:39:08,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:08,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:08,590 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-19 07:39:08,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:08,590 INFO L85 PathProgramCache]: Analyzing trace with hash 711543492, now seen corresponding path program 1 times [2023-11-19 07:39:08,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:08,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073181547] [2023-11-19 07:39:08,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:08,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:08,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:08,592 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:08,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:08,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:39:08,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:08,682 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 [2023-11-19 07:39:08,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,706 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 [2023-11-19 07:39:08,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,715 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 [2023-11-19 07:39:08,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,728 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 [2023-11-19 07:39:08,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,754 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 [2023-11-19 07:39:08,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,769 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 [2023-11-19 07:39:08,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,779 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 [2023-11-19 07:39:08,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,784 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 [2023-11-19 07:39:08,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,790 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 [2023-11-19 07:39:08,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,797 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 [2023-11-19 07:39:08,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,807 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 [2023-11-19 07:39:08,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,821 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 [2023-11-19 07:39:08,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,831 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 [2023-11-19 07:39:08,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,836 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 [2023-11-19 07:39:08,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,841 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 [2023-11-19 07:39:08,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,849 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 [2023-11-19 07:39:08,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,864 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 [2023-11-19 07:39:08,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,872 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 11 treesize of output 1 [2023-11-19 07:39:08,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,882 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 11 treesize of output 1 [2023-11-19 07:39:08,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,887 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 [2023-11-19 07:39:08,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,901 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 [2023-11-19 07:39:08,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,908 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 [2023-11-19 07:39:08,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,917 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 [2023-11-19 07:39:08,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:08,922 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 [2023-11-19 07:39:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:08,941 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:08,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:08,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073181547] [2023-11-19 07:39:08,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073181547] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:08,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:08,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:39:08,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904789964] [2023-11-19 07:39:08,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:08,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:39:08,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:08,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:39:08,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:39:09,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 366 [2023-11-19 07:39:09,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:09,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:09,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 366 [2023-11-19 07:39:09,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:09,403 INFO L124 PetriNetUnfolderBase]: 431/703 cut-off events. [2023-11-19 07:39:09,404 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-19 07:39:09,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 703 events. 431/703 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2769 event pairs, 359 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 1405. Up to 646 conditions per place. [2023-11-19 07:39:09,410 INFO L140 encePairwiseOnDemand]: 362/366 looper letters, 32 selfloop transitions, 6 changer transitions 0/40 dead transitions. [2023-11-19 07:39:09,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 40 transitions, 205 flow [2023-11-19 07:39:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:39:09,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:39:09,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 640 transitions. [2023-11-19 07:39:09,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371584699453552 [2023-11-19 07:39:09,414 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 640 transitions. [2023-11-19 07:39:09,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 640 transitions. [2023-11-19 07:39:09,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:09,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 640 transitions. [2023-11-19 07:39:09,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.0) internal successors, (640), 4 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) [2023-11-19 07:39:09,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:09,421 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:09,421 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 133 flow. Second operand 4 states and 640 transitions. [2023-11-19 07:39:09,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 40 transitions, 205 flow [2023-11-19 07:39:09,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 40 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:09,424 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 140 flow [2023-11-19 07:39:09,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2023-11-19 07:39:09,425 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2023-11-19 07:39:09,425 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 140 flow [2023-11-19 07:39:09,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:09,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:09,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:39:09,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:09,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:09,628 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-19 07:39:09,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:09,628 INFO L85 PathProgramCache]: Analyzing trace with hash 711543491, now seen corresponding path program 1 times [2023-11-19 07:39:09,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:09,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108315460] [2023-11-19 07:39:09,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:09,629 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 [2023-11-19 07:39:09,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:09,630 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:09,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:09,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:39:09,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:09,790 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:09,790 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:09,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108315460] [2023-11-19 07:39:09,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108315460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:09,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:09,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:39:09,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316207320] [2023-11-19 07:39:09,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:09,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:39:09,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:09,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:39:09,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:39:09,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 366 [2023-11-19 07:39:09,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:09,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:09,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 366 [2023-11-19 07:39:09,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:10,290 INFO L124 PetriNetUnfolderBase]: 591/990 cut-off events. [2023-11-19 07:39:10,291 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-19 07:39:10,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2017 conditions, 990 events. 591/990 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4325 event pairs, 520 based on Foata normal form. 26/736 useless extension candidates. Maximal degree in co-relation 2001. Up to 652 conditions per place. [2023-11-19 07:39:10,298 INFO L140 encePairwiseOnDemand]: 359/366 looper letters, 57 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2023-11-19 07:39:10,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 62 transitions, 310 flow [2023-11-19 07:39:10,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:39:10,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:39:10,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 674 transitions. [2023-11-19 07:39:10,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603825136612022 [2023-11-19 07:39:10,302 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 674 transitions. [2023-11-19 07:39:10,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 674 transitions. [2023-11-19 07:39:10,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:10,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 674 transitions. [2023-11-19 07:39:10,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 168.5) internal successors, (674), 4 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) [2023-11-19 07:39:10,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:10,309 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:10,309 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 140 flow. Second operand 4 states and 674 transitions. [2023-11-19 07:39:10,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 62 transitions, 310 flow [2023-11-19 07:39:10,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 62 transitions, 303 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:39:10,312 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 148 flow [2023-11-19 07:39:10,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-11-19 07:39:10,313 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-11-19 07:39:10,313 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 148 flow [2023-11-19 07:39:10,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:10,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:10,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:39:10,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:10,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:10,516 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-19 07:39:10,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:10,517 INFO L85 PathProgramCache]: Analyzing trace with hash 575583237, now seen corresponding path program 1 times [2023-11-19 07:39:10,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:10,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124773431] [2023-11-19 07:39:10,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:10,517 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 [2023-11-19 07:39:10,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:10,519 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:10,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:10,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:39:10,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:10,625 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 [2023-11-19 07:39:10,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,637 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 [2023-11-19 07:39:10,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,667 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 [2023-11-19 07:39:10,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,683 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 [2023-11-19 07:39:10,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,693 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 [2023-11-19 07:39:10,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,706 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 [2023-11-19 07:39:10,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,724 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 [2023-11-19 07:39:10,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,748 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 [2023-11-19 07:39:10,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,774 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 [2023-11-19 07:39:10,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,814 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 [2023-11-19 07:39:10,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,838 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 [2023-11-19 07:39:10,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,849 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 [2023-11-19 07:39:10,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,859 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 [2023-11-19 07:39:10,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,869 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 [2023-11-19 07:39:10,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,881 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 [2023-11-19 07:39:10,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,888 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 [2023-11-19 07:39:10,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,912 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 [2023-11-19 07:39:10,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,922 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 [2023-11-19 07:39:10,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,936 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 13 treesize of output 1 [2023-11-19 07:39:10,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,943 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 [2023-11-19 07:39:10,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,956 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 [2023-11-19 07:39:10,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,964 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 [2023-11-19 07:39:10,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,977 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 [2023-11-19 07:39:10,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,997 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 [2023-11-19 07:39:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:11,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:11,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:11,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124773431] [2023-11-19 07:39:11,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124773431] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:11,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:39:11,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-19 07:39:11,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457357344] [2023-11-19 07:39:11,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:11,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:39:11,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:11,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:39:11,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:39:14,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 366 [2023-11-19 07:39:14,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 148 flow. Second operand has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:14,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:14,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 366 [2023-11-19 07:39:14,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:16,395 INFO L124 PetriNetUnfolderBase]: 1143/1908 cut-off events. [2023-11-19 07:39:16,395 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2023-11-19 07:39:16,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4130 conditions, 1908 events. 1143/1908 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9451 event pairs, 966 based on Foata normal form. 68/1641 useless extension candidates. Maximal degree in co-relation 4113. Up to 645 conditions per place. [2023-11-19 07:39:16,412 INFO L140 encePairwiseOnDemand]: 360/366 looper letters, 98 selfloop transitions, 10 changer transitions 0/110 dead transitions. [2023-11-19 07:39:16,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 110 transitions, 530 flow [2023-11-19 07:39:16,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:39:16,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:39:16,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1408 transitions. [2023-11-19 07:39:16,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42744383727990287 [2023-11-19 07:39:16,420 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1408 transitions. [2023-11-19 07:39:16,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1408 transitions. [2023-11-19 07:39:16,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:16,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1408 transitions. [2023-11-19 07:39:16,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 156.44444444444446) internal successors, (1408), 9 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:16,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 366.0) internal successors, (3660), 10 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:16,435 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 366.0) internal successors, (3660), 10 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:16,435 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 148 flow. Second operand 9 states and 1408 transitions. [2023-11-19 07:39:16,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 110 transitions, 530 flow [2023-11-19 07:39:16,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 110 transitions, 525 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:39:16,441 INFO L231 Difference]: Finished difference. Result has 59 places, 40 transitions, 174 flow [2023-11-19 07:39:16,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=174, PETRI_PLACES=59, PETRI_TRANSITIONS=40} [2023-11-19 07:39:16,442 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 8 predicate places. [2023-11-19 07:39:16,442 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 40 transitions, 174 flow [2023-11-19 07:39:16,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:16,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:16,443 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-19 07:39:16,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:16,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:16,651 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-19 07:39:16,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:16,651 INFO L85 PathProgramCache]: Analyzing trace with hash 575335560, now seen corresponding path program 2 times [2023-11-19 07:39:16,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:16,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915116314] [2023-11-19 07:39:16,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:39:16,652 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 [2023-11-19 07:39:16,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:16,654 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:16,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:16,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:39:16,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:39:16,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:39:16,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:16,766 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 [2023-11-19 07:39:16,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:16,782 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 [2023-11-19 07:39:16,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:16,793 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 [2023-11-19 07:39:16,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:16,812 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 [2023-11-19 07:39:16,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:16,843 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 [2023-11-19 07:39:16,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:16,862 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 [2023-11-19 07:39:16,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:16,882 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 [2023-11-19 07:39:16,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:16,892 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 [2023-11-19 07:39:16,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:16,913 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 [2023-11-19 07:39:16,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:16,929 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 [2023-11-19 07:39:16,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:16,940 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 [2023-11-19 07:39:16,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:16,947 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 [2023-11-19 07:39:16,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:16,960 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 [2023-11-19 07:39:16,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:16,975 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 [2023-11-19 07:39:16,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:16,987 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 13 treesize of output 1 [2023-11-19 07:39:16,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:16,994 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 [2023-11-19 07:39:17,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:17,017 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 [2023-11-19 07:39:17,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:17,029 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 [2023-11-19 07:39:17,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:17,048 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 [2023-11-19 07:39:17,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:17,058 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 [2023-11-19 07:39:17,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:17,074 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 [2023-11-19 07:39:17,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:17,094 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 [2023-11-19 07:39:17,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:17,104 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 [2023-11-19 07:39:17,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:17,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 07:39:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:17,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:17,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:17,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915116314] [2023-11-19 07:39:17,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915116314] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:17,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:39:17,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-19 07:39:17,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438488613] [2023-11-19 07:39:17,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:17,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:39:17,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:17,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:39:17,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:39:21,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 366 [2023-11-19 07:39:21,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 40 transitions, 174 flow. Second operand has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:21,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:21,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 366 [2023-11-19 07:39:21,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:24,018 INFO L124 PetriNetUnfolderBase]: 1144/1910 cut-off events. [2023-11-19 07:39:24,018 INFO L125 PetriNetUnfolderBase]: For 552/552 co-relation queries the response was YES. [2023-11-19 07:39:24,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4356 conditions, 1910 events. 1144/1910 cut-off events. For 552/552 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9454 event pairs, 966 based on Foata normal form. 6/1619 useless extension candidates. Maximal degree in co-relation 4337. Up to 1781 conditions per place. [2023-11-19 07:39:24,035 INFO L140 encePairwiseOnDemand]: 362/366 looper letters, 29 selfloop transitions, 21 changer transitions 0/52 dead transitions. [2023-11-19 07:39:24,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 52 transitions, 352 flow [2023-11-19 07:39:24,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:39:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:39:24,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1844 transitions. [2023-11-19 07:39:24,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4198542805100182 [2023-11-19 07:39:24,044 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1844 transitions. [2023-11-19 07:39:24,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1844 transitions. [2023-11-19 07:39:24,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:24,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1844 transitions. [2023-11-19 07:39:24,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 153.66666666666666) internal successors, (1844), 12 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:24,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 366.0) internal successors, (4758), 13 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:24,061 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 366.0) internal successors, (4758), 13 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:24,061 INFO L175 Difference]: Start difference. First operand has 59 places, 40 transitions, 174 flow. Second operand 12 states and 1844 transitions. [2023-11-19 07:39:24,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 52 transitions, 352 flow [2023-11-19 07:39:24,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 52 transitions, 324 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-11-19 07:39:24,065 INFO L231 Difference]: Finished difference. Result has 69 places, 52 transitions, 300 flow [2023-11-19 07:39:24,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=300, PETRI_PLACES=69, PETRI_TRANSITIONS=52} [2023-11-19 07:39:24,066 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2023-11-19 07:39:24,066 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 52 transitions, 300 flow [2023-11-19 07:39:24,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:24,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:24,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:39:24,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:24,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:24,275 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-19 07:39:24,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:24,275 INFO L85 PathProgramCache]: Analyzing trace with hash 583153902, now seen corresponding path program 1 times [2023-11-19 07:39:24,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:24,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024218216] [2023-11-19 07:39:24,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:24,276 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 [2023-11-19 07:39:24,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:24,277 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:24,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:24,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:39:24,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:24,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,416 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 [2023-11-19 07:39:24,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,433 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 [2023-11-19 07:39:24,437 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:39:24,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,453 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:39:24,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,460 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:39:24,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,467 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:39:24,473 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:39:24,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,484 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 [2023-11-19 07:39:24,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,490 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:39:24,496 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:39:24,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,507 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 [2023-11-19 07:39:24,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,513 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:39:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:24,541 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:24,541 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:24,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024218216] [2023-11-19 07:39:24,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024218216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:24,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:24,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:39:24,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107423624] [2023-11-19 07:39:24,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:24,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:24,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:24,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:24,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:24,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 366 [2023-11-19 07:39:24,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 52 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:24,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:24,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 366 [2023-11-19 07:39:24,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:25,020 INFO L124 PetriNetUnfolderBase]: 1010/1687 cut-off events. [2023-11-19 07:39:25,020 INFO L125 PetriNetUnfolderBase]: For 486/486 co-relation queries the response was YES. [2023-11-19 07:39:25,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3909 conditions, 1687 events. 1010/1687 cut-off events. For 486/486 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8042 event pairs, 857 based on Foata normal form. 0/1488 useless extension candidates. Maximal degree in co-relation 3886. Up to 1591 conditions per place. [2023-11-19 07:39:25,045 INFO L140 encePairwiseOnDemand]: 363/366 looper letters, 47 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-11-19 07:39:25,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 50 transitions, 392 flow [2023-11-19 07:39:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:25,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:25,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-11-19 07:39:25,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45081967213114754 [2023-11-19 07:39:25,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-11-19 07:39:25,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-11-19 07:39:25,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:25,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-11-19 07:39:25,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:25,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:25,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:25,071 INFO L175 Difference]: Start difference. First operand has 69 places, 52 transitions, 300 flow. Second operand 3 states and 495 transitions. [2023-11-19 07:39:25,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 50 transitions, 392 flow [2023-11-19 07:39:25,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 50 transitions, 310 flow, removed 32 selfloop flow, removed 5 redundant places. [2023-11-19 07:39:25,075 INFO L231 Difference]: Finished difference. Result has 64 places, 50 transitions, 216 flow [2023-11-19 07:39:25,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=64, PETRI_TRANSITIONS=50} [2023-11-19 07:39:25,076 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2023-11-19 07:39:25,077 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 50 transitions, 216 flow [2023-11-19 07:39:25,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:25,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:25,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:39:25,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:25,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:25,281 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-19 07:39:25,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:25,281 INFO L85 PathProgramCache]: Analyzing trace with hash 583153903, now seen corresponding path program 1 times [2023-11-19 07:39:25,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:25,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035821385] [2023-11-19 07:39:25,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:25,281 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 [2023-11-19 07:39:25,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:25,283 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:25,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b324e30-35b1-47a3-99b6-b3fead09a373/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:25,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:39:25,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:25,404 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:25,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-19 07:39:25,427 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:25,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-19 07:39:25,456 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:25,457 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 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-19 07:39:25,480 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:25,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15