./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/test-context1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme --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 d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:52:00,580 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:52:00,655 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:52:00,661 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:52:00,661 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:52:00,689 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:52:00,690 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:52:00,690 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:52:00,691 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:52:00,692 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:52:00,693 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:52:00,694 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:52:00,695 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:52:00,696 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:52:00,696 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:52:00,697 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:52:00,698 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:52:00,698 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:52:00,699 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:52:00,699 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:52:00,700 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:52:00,701 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:52:00,702 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:52:00,702 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:52:00,703 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:52:00,703 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:52:00,704 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:52:00,704 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:52:00,705 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:52:00,706 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:52:00,706 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:52:00,707 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:52:00,707 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:52:00,708 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:52:00,709 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:52:00,709 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:52:00,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:52:00,710 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:52:00,711 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:52:00,711 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:52:00,711 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:52:00,712 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_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e [2023-11-26 11:52:00,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:52:00,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:52:00,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:52:00,989 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:52:00,990 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:52:00,991 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-26 11:52:04,202 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:52:04,454 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:52:04,455 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-26 11:52:04,464 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/data/14d64f6d7/8f1f5a4a13084b5e939a721c72d2f673/FLAG2cf06406a [2023-11-26 11:52:04,479 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/data/14d64f6d7/8f1f5a4a13084b5e939a721c72d2f673 [2023-11-26 11:52:04,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:52:04,484 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:52:04,486 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:52:04,486 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:52:04,492 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:52:04,493 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:52:04" (1/1) ... [2023-11-26 11:52:04,494 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a4cfa26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:04, skipping insertion in model container [2023-11-26 11:52:04,494 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:52:04" (1/1) ... [2023-11-26 11:52:04,520 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:52:04,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:52:04,724 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) [2023-11-26 11:52:04,725 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5c3b4609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:04, skipping insertion in model container [2023-11-26 11:52:04,725 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:52:04,726 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-26 11:52:04,728 INFO L158 Benchmark]: Toolchain (without parser) took 242.99ms. Allocated memory is still 190.8MB. Free memory was 142.0MB in the beginning and 132.4MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-26 11:52:04,729 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 151.0MB. Free memory is still 92.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 11:52:04,730 INFO L158 Benchmark]: CACSL2BoogieTranslator took 240.10ms. Allocated memory is still 190.8MB. Free memory was 142.0MB in the beginning and 132.4MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-26 11:52:04,732 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 151.0MB. Free memory is still 92.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 240.10ms. Allocated memory is still 190.8MB. Free memory was 142.0MB in the beginning and 132.4MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 94]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/test-context1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme --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 d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:52:07,248 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:52:07,386 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-26 11:52:07,398 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:52:07,401 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:52:07,449 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:52:07,450 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:52:07,451 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:52:07,452 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:52:07,457 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:52:07,457 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:52:07,458 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:52:07,458 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:52:07,460 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:52:07,461 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:52:07,461 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:52:07,461 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:52:07,462 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:52:07,462 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:52:07,463 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:52:07,463 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:52:07,464 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:52:07,464 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:52:07,465 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:52:07,465 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:52:07,466 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-26 11:52:07,466 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-26 11:52:07,466 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:52:07,467 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:52:07,467 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:52:07,469 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:52:07,469 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:52:07,470 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:52:07,470 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:52:07,470 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:52:07,471 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:52:07,472 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:52:07,472 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-26 11:52:07,472 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-26 11:52:07,472 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:52:07,473 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:52:07,473 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:52:07,473 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:52:07,474 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-26 11:52:07,474 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_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e [2023-11-26 11:52:07,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:52:07,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:52:07,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:52:07,904 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:52:07,905 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:52:07,906 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-26 11:52:11,091 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:52:11,373 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:52:11,373 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-26 11:52:11,382 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/data/1305cc596/d5eae1a464a14b089510d79daa571789/FLAG57b061623 [2023-11-26 11:52:11,398 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/data/1305cc596/d5eae1a464a14b089510d79daa571789 [2023-11-26 11:52:11,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:52:11,402 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:52:11,404 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:52:11,404 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:52:11,409 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:52:11,409 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:52:11" (1/1) ... [2023-11-26 11:52:11,410 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65f1a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:11, skipping insertion in model container [2023-11-26 11:52:11,410 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:52:11" (1/1) ... [2023-11-26 11:52:11,437 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:52:11,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:52:11,684 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-26 11:52:11,701 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:52:11,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:52:11,747 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:52:11,792 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:52:11,813 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:52:11,813 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:52:11,821 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:52:11,822 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:11 WrapperNode [2023-11-26 11:52:11,822 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:52:11,823 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:52:11,823 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:52:11,824 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:52:11,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:11" (1/1) ... [2023-11-26 11:52:11,865 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:11" (1/1) ... [2023-11-26 11:52:11,916 INFO L138 Inliner]: procedures = 26, calls = 35, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 137 [2023-11-26 11:52:11,917 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:52:11,919 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:52:11,919 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:52:11,919 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:52:11,932 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:11" (1/1) ... [2023-11-26 11:52:11,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:11" (1/1) ... [2023-11-26 11:52:11,939 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:11" (1/1) ... [2023-11-26 11:52:11,966 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 2, 2, 3]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-26 11:52:11,973 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:11" (1/1) ... [2023-11-26 11:52:11,974 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:11" (1/1) ... [2023-11-26 11:52:11,985 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:11" (1/1) ... [2023-11-26 11:52:12,001 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:11" (1/1) ... [2023-11-26 11:52:12,008 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:11" (1/1) ... [2023-11-26 11:52:12,012 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:11" (1/1) ... [2023-11-26 11:52:12,016 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:52:12,020 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:52:12,021 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:52:12,021 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:52:12,022 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:11" (1/1) ... [2023-11-26 11:52:12,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:52:12,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:12,074 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:52:12,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:52:12,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:52:12,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-26 11:52:12,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-26 11:52:12,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-26 11:52:12,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-26 11:52:12,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:52:12,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-26 11:52:12,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-26 11:52:12,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-26 11:52:12,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-26 11:52:12,137 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:52:12,137 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:52:12,138 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:52:12,138 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:52:12,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:52:12,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:52:12,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:52:12,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:52:12,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:52:12,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:52:12,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-26 11:52:12,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-26 11:52:12,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-26 11:52:12,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-26 11:52:12,143 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:52:12,321 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:52:12,323 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:52:12,724 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:52:12,980 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:52:12,980 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 11:52:12,980 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:52:12 BoogieIcfgContainer [2023-11-26 11:52:12,980 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:52:12,983 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:52:12,983 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:52:12,997 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:52:12,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:52:11" (1/3) ... [2023-11-26 11:52:12,998 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7f616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:52:12, skipping insertion in model container [2023-11-26 11:52:12,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:11" (2/3) ... [2023-11-26 11:52:12,999 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7f616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:52:12, skipping insertion in model container [2023-11-26 11:52:12,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:52:12" (3/3) ... [2023-11-26 11:52:13,001 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2023-11-26 11:52:13,022 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:52:13,022 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-26 11:52:13,023 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:52:13,103 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:52:13,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 50 transitions, 114 flow [2023-11-26 11:52:13,199 INFO L124 PetriNetUnfolderBase]: 5/48 cut-off events. [2023-11-26 11:52:13,200 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:52:13,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 48 events. 5/48 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2023-11-26 11:52:13,204 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 50 transitions, 114 flow [2023-11-26 11:52:13,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 47 transitions, 106 flow [2023-11-26 11:52:13,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:52:13,246 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;@1bc91c37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:52:13,246 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-26 11:52:13,250 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:52:13,250 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-26 11:52:13,250 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:52:13,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:13,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:52:13,252 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 11:52:13,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:13,258 INFO L85 PathProgramCache]: Analyzing trace with hash 446589, now seen corresponding path program 1 times [2023-11-26 11:52:13,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:52:13,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320088145] [2023-11-26 11:52:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:13,275 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 [2023-11-26 11:52:13,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:52:13,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:52:13,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:13,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:52:13,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:13,470 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 [2023-11-26 11:52:13,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:13,486 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 [2023-11-26 11:52:13,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:13,510 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 [2023-11-26 11:52:13,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:13,535 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 [2023-11-26 11:52:13,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:13,553 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 [2023-11-26 11:52:13,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:13,567 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 [2023-11-26 11:52:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:13,587 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:13,588 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:52:13,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320088145] [2023-11-26 11:52:13,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320088145] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:13,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:13,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:52:13,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376545886] [2023-11-26 11:52:13,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:13,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:52:13,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:52:13,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:52:13,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:13,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 50 [2023-11-26 11:52:13,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:13,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:13,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 50 [2023-11-26 11:52:13,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:14,006 INFO L124 PetriNetUnfolderBase]: 187/402 cut-off events. [2023-11-26 11:52:14,006 INFO L125 PetriNetUnfolderBase]: For 35/38 co-relation queries the response was YES. [2023-11-26 11:52:14,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 737 conditions, 402 events. 187/402 cut-off events. For 35/38 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1998 event pairs, 128 based on Foata normal form. 54/286 useless extension candidates. Maximal degree in co-relation 646. Up to 305 conditions per place. [2023-11-26 11:52:14,014 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 21 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-11-26 11:52:14,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 142 flow [2023-11-26 11:52:14,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:52:14,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:52:14,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2023-11-26 11:52:14,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2023-11-26 11:52:14,029 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 93 transitions. [2023-11-26 11:52:14,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 93 transitions. [2023-11-26 11:52:14,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:14,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 93 transitions. [2023-11-26 11:52:14,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:14,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:14,039 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:14,041 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 3 states and 93 transitions. [2023-11-26 11:52:14,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 142 flow [2023-11-26 11:52:14,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 134 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:52:14,048 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 92 flow [2023-11-26 11:52:14,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-11-26 11:52:14,054 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-11-26 11:52:14,054 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 92 flow [2023-11-26 11:52:14,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:14,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:14,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:52:14,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:14,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:52:14,258 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 11:52:14,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:14,258 INFO L85 PathProgramCache]: Analyzing trace with hash 446590, now seen corresponding path program 1 times [2023-11-26 11:52:14,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:52:14,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597772587] [2023-11-26 11:52:14,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:14,260 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 [2023-11-26 11:52:14,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:52:14,261 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:52:14,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:14,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:52:14,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:14,356 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 [2023-11-26 11:52:14,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:14,375 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 [2023-11-26 11:52:14,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:14,399 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 [2023-11-26 11:52:14,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:14,411 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 [2023-11-26 11:52:14,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:14,442 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 [2023-11-26 11:52:14,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:14,477 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 [2023-11-26 11:52:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:14,594 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:14,594 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:52:14,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597772587] [2023-11-26 11:52:14,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597772587] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:14,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:14,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:52:14,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995467667] [2023-11-26 11:52:14,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:14,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:52:14,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:52:14,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:52:14,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:52:14,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 50 [2023-11-26 11:52:14,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:14,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:14,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 50 [2023-11-26 11:52:14,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:15,107 INFO L124 PetriNetUnfolderBase]: 188/405 cut-off events. [2023-11-26 11:52:15,108 INFO L125 PetriNetUnfolderBase]: For 8/11 co-relation queries the response was YES. [2023-11-26 11:52:15,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 405 events. 188/405 cut-off events. For 8/11 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2017 event pairs, 128 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 708. Up to 310 conditions per place. [2023-11-26 11:52:15,113 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 23 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2023-11-26 11:52:15,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 154 flow [2023-11-26 11:52:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:52:15,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:52:15,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2023-11-26 11:52:15,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2023-11-26 11:52:15,116 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 116 transitions. [2023-11-26 11:52:15,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 116 transitions. [2023-11-26 11:52:15,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:15,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 116 transitions. [2023-11-26 11:52:15,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:15,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:15,119 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:15,120 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 92 flow. Second operand 4 states and 116 transitions. [2023-11-26 11:52:15,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 154 flow [2023-11-26 11:52:15,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 148 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:52:15,122 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 115 flow [2023-11-26 11:52:15,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-11-26 11:52:15,124 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-11-26 11:52:15,124 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 115 flow [2023-11-26 11:52:15,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:15,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:15,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:52:15,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:15,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:52:15,327 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 11:52:15,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:15,329 INFO L85 PathProgramCache]: Analyzing trace with hash 446624, now seen corresponding path program 1 times [2023-11-26 11:52:15,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:52:15,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982781278] [2023-11-26 11:52:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:15,330 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 [2023-11-26 11:52:15,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:52:15,331 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:52:15,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:15,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:52:15,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:15,480 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 11:52:15,481 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 [2023-11-26 11:52:15,528 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-26 11:52:15,528 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 [2023-11-26 11:52:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:15,606 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:15,606 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:52:15,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982781278] [2023-11-26 11:52:15,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982781278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:15,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:15,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:52:15,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174903043] [2023-11-26 11:52:15,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:15,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:52:15,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:52:15,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:52:15,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:15,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2023-11-26 11:52:15,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:15,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:15,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2023-11-26 11:52:15,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:15,900 INFO L124 PetriNetUnfolderBase]: 300/554 cut-off events. [2023-11-26 11:52:15,901 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-26 11:52:15,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1050 conditions, 554 events. 300/554 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2646 event pairs, 212 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 1026. Up to 472 conditions per place. [2023-11-26 11:52:15,909 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 27 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-11-26 11:52:15,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 167 flow [2023-11-26 11:52:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:52:15,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:52:15,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2023-11-26 11:52:15,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2023-11-26 11:52:15,916 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 84 transitions. [2023-11-26 11:52:15,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 84 transitions. [2023-11-26 11:52:15,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:15,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 84 transitions. [2023-11-26 11:52:15,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:15,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:15,921 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:15,921 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 115 flow. Second operand 3 states and 84 transitions. [2023-11-26 11:52:15,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 167 flow [2023-11-26 11:52:15,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:52:15,924 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 110 flow [2023-11-26 11:52:15,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=44, 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=110, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-11-26 11:52:15,936 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2023-11-26 11:52:15,937 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 110 flow [2023-11-26 11:52:15,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:15,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:15,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:52:15,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:16,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:52:16,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 11:52:16,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:16,139 INFO L85 PathProgramCache]: Analyzing trace with hash 446625, now seen corresponding path program 1 times [2023-11-26 11:52:16,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:52:16,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554979729] [2023-11-26 11:52:16,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:16,140 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 [2023-11-26 11:52:16,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:52:16,142 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:52:16,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:16,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:52:16,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:16,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:16,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-26 11:52:16,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:16,289 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 [2023-11-26 11:52:16,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:16,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:16,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-26 11:52:16,337 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 [2023-11-26 11:52:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:16,397 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:16,397 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:52:16,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554979729] [2023-11-26 11:52:16,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554979729] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:16,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:16,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:52:16,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963324858] [2023-11-26 11:52:16,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:16,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:52:16,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:52:16,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:52:16,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:16,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2023-11-26 11:52:16,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:16,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:16,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2023-11-26 11:52:16,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:16,683 INFO L124 PetriNetUnfolderBase]: 188/385 cut-off events. [2023-11-26 11:52:16,683 INFO L125 PetriNetUnfolderBase]: For 8/11 co-relation queries the response was YES. [2023-11-26 11:52:16,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 385 events. 188/385 cut-off events. For 8/11 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1814 event pairs, 128 based on Foata normal form. 50/285 useless extension candidates. Maximal degree in co-relation 709. Up to 310 conditions per place. [2023-11-26 11:52:16,687 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 25 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-26 11:52:16,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 158 flow [2023-11-26 11:52:16,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:52:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:52:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-26 11:52:16,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2023-11-26 11:52:16,689 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-26 11:52:16,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-26 11:52:16,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:16,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-26 11:52:16,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:16,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:16,692 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:16,692 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 110 flow. Second operand 3 states and 88 transitions. [2023-11-26 11:52:16,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 158 flow [2023-11-26 11:52:16,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:52:16,694 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 107 flow [2023-11-26 11:52:16,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-11-26 11:52:16,696 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2023-11-26 11:52:16,696 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 107 flow [2023-11-26 11:52:16,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:16,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:16,696 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-26 11:52:16,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:16,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:52:16,899 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 11:52:16,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:16,900 INFO L85 PathProgramCache]: Analyzing trace with hash 429186169, now seen corresponding path program 1 times [2023-11-26 11:52:16,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:52:16,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137266506] [2023-11-26 11:52:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:16,901 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 [2023-11-26 11:52:16,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:52:16,902 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:52:16,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:16,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:52:16,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:17,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-26 11:52:17,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:17,034 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 [2023-11-26 11:52:17,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:17,047 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 [2023-11-26 11:52:17,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:17,059 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 [2023-11-26 11:52:17,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:17,101 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 [2023-11-26 11:52:17,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:17,118 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 [2023-11-26 11:52:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:17,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:17,789 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:52:17,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137266506] [2023-11-26 11:52:17,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137266506] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:17,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:52:17,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-26 11:52:17,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714582650] [2023-11-26 11:52:17,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:17,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:52:17,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:52:17,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:52:17,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:52:18,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 50 [2023-11-26 11:52:18,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 107 flow. Second operand has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:18,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:18,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 50 [2023-11-26 11:52:18,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:19,408 INFO L124 PetriNetUnfolderBase]: 191/394 cut-off events. [2023-11-26 11:52:19,408 INFO L125 PetriNetUnfolderBase]: For 8/11 co-relation queries the response was YES. [2023-11-26 11:52:19,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 394 events. 191/394 cut-off events. For 8/11 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1859 event pairs, 128 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 737. Up to 313 conditions per place. [2023-11-26 11:52:19,411 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 23 selfloop transitions, 13 changer transitions 0/50 dead transitions. [2023-11-26 11:52:19,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 215 flow [2023-11-26 11:52:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:52:19,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:52:19,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2023-11-26 11:52:19,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518 [2023-11-26 11:52:19,416 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 259 transitions. [2023-11-26 11:52:19,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 259 transitions. [2023-11-26 11:52:19,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:19,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 259 transitions. [2023-11-26 11:52:19,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 25.9) internal successors, (259), 10 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:19,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 50.0) internal successors, (550), 11 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:19,422 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 50.0) internal successors, (550), 11 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:19,422 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 107 flow. Second operand 10 states and 259 transitions. [2023-11-26 11:52:19,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 215 flow [2023-11-26 11:52:19,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:52:19,426 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 186 flow [2023-11-26 11:52:19,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=186, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2023-11-26 11:52:19,429 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2023-11-26 11:52:19,429 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 186 flow [2023-11-26 11:52:19,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:19,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:19,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 11:52:19,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:19,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:52:19,634 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 11:52:19,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:19,635 INFO L85 PathProgramCache]: Analyzing trace with hash 420883858, now seen corresponding path program 1 times [2023-11-26 11:52:19,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:52:19,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668745707] [2023-11-26 11:52:19,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:19,636 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 [2023-11-26 11:52:19,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:52:19,637 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:52:19,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:19,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:52:19,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:19,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:19,771 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 [2023-11-26 11:52:19,784 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 [2023-11-26 11:52:19,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:19,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:19,802 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 [2023-11-26 11:52:19,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:19,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:19,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 11:52:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:19,854 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:19,854 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:52:19,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668745707] [2023-11-26 11:52:19,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668745707] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:19,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:19,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:52:19,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100704201] [2023-11-26 11:52:19,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:19,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:52:19,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:52:19,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:52:19,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:19,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2023-11-26 11:52:19,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:19,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:19,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2023-11-26 11:52:19,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:20,079 INFO L124 PetriNetUnfolderBase]: 191/384 cut-off events. [2023-11-26 11:52:20,079 INFO L125 PetriNetUnfolderBase]: For 17/20 co-relation queries the response was YES. [2023-11-26 11:52:20,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 384 events. 191/384 cut-off events. For 17/20 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1789 event pairs, 128 based on Foata normal form. 14/258 useless extension candidates. Maximal degree in co-relation 747. Up to 319 conditions per place. [2023-11-26 11:52:20,083 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 34 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-11-26 11:52:20,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 48 transitions, 252 flow [2023-11-26 11:52:20,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:52:20,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:52:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-26 11:52:20,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2023-11-26 11:52:20,085 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-26 11:52:20,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-26 11:52:20,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:20,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-26 11:52:20,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:20,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:20,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:20,087 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 186 flow. Second operand 3 states and 88 transitions. [2023-11-26 11:52:20,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 48 transitions, 252 flow [2023-11-26 11:52:20,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 222 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-26 11:52:20,094 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 154 flow [2023-11-26 11:52:20,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2023-11-26 11:52:20,098 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2023-11-26 11:52:20,098 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 154 flow [2023-11-26 11:52:20,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:20,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:20,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 11:52:20,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:20,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:52:20,301 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 11:52:20,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:20,302 INFO L85 PathProgramCache]: Analyzing trace with hash 420883857, now seen corresponding path program 1 times [2023-11-26 11:52:20,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:52:20,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346812172] [2023-11-26 11:52:20,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:20,302 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 [2023-11-26 11:52:20,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:52:20,303 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:52:20,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:20,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:52:20,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:20,420 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 11:52:20,421 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 [2023-11-26 11:52:20,450 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 11:52:20,450 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 [2023-11-26 11:52:20,477 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 11:52:20,477 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 [2023-11-26 11:52:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:20,575 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:20,575 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:52:20,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346812172] [2023-11-26 11:52:20,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346812172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:20,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:20,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:52:20,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086850813] [2023-11-26 11:52:20,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:20,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:52:20,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:52:20,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:52:20,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:20,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2023-11-26 11:52:20,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:20,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:20,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2023-11-26 11:52:20,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:20,827 INFO L124 PetriNetUnfolderBase]: 207/395 cut-off events. [2023-11-26 11:52:20,827 INFO L125 PetriNetUnfolderBase]: For 13/16 co-relation queries the response was YES. [2023-11-26 11:52:20,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 395 events. 207/395 cut-off events. For 13/16 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1796 event pairs, 140 based on Foata normal form. 0/256 useless extension candidates. Maximal degree in co-relation 774. Up to 349 conditions per place. [2023-11-26 11:52:20,831 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 36 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-26 11:52:20,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 46 transitions, 224 flow [2023-11-26 11:52:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:52:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:52:20,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2023-11-26 11:52:20,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2023-11-26 11:52:20,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 84 transitions. [2023-11-26 11:52:20,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 84 transitions. [2023-11-26 11:52:20,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:20,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 84 transitions. [2023-11-26 11:52:20,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:20,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:20,835 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:20,835 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 154 flow. Second operand 3 states and 84 transitions. [2023-11-26 11:52:20,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 46 transitions, 224 flow [2023-11-26 11:52:20,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 46 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:52:20,839 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 151 flow [2023-11-26 11:52:20,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2023-11-26 11:52:20,840 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-11-26 11:52:20,840 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 151 flow [2023-11-26 11:52:20,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:20,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:20,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:20,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:21,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:52:21,043 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 11:52:21,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:21,043 INFO L85 PathProgramCache]: Analyzing trace with hash 742732928, now seen corresponding path program 1 times [2023-11-26 11:52:21,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:52:21,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571698278] [2023-11-26 11:52:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:21,045 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 [2023-11-26 11:52:21,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:52:21,047 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:52:21,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:21,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:52:21,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:21,141 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 [2023-11-26 11:52:21,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:21,159 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 [2023-11-26 11:52:21,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:21,168 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 [2023-11-26 11:52:21,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:21,174 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 [2023-11-26 11:52:21,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:21,182 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 [2023-11-26 11:52:21,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:21,191 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 [2023-11-26 11:52:21,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:21,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:21,218 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:52:21,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571698278] [2023-11-26 11:52:21,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571698278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:21,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:21,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:52:21,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456833434] [2023-11-26 11:52:21,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:21,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:52:21,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:52:21,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:52:21,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:52:21,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 50 [2023-11-26 11:52:21,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 151 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:21,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:21,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 50 [2023-11-26 11:52:21,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:21,488 INFO L124 PetriNetUnfolderBase]: 146/296 cut-off events. [2023-11-26 11:52:21,488 INFO L125 PetriNetUnfolderBase]: For 13/16 co-relation queries the response was YES. [2023-11-26 11:52:21,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 296 events. 146/296 cut-off events. For 13/16 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1276 event pairs, 91 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 570. Up to 234 conditions per place. [2023-11-26 11:52:21,491 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 27 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2023-11-26 11:52:21,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 44 transitions, 213 flow [2023-11-26 11:52:21,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:52:21,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:52:21,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2023-11-26 11:52:21,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2023-11-26 11:52:21,493 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 111 transitions. [2023-11-26 11:52:21,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 111 transitions. [2023-11-26 11:52:21,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:21,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 111 transitions. [2023-11-26 11:52:21,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:21,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:21,495 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:21,495 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 151 flow. Second operand 4 states and 111 transitions. [2023-11-26 11:52:21,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 44 transitions, 213 flow [2023-11-26 11:52:21,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 44 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:52:21,497 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 158 flow [2023-11-26 11:52:21,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2023-11-26 11:52:21,498 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-11-26 11:52:21,498 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 158 flow [2023-11-26 11:52:21,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:21,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:21,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:21,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:21,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:52:21,705 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 11:52:21,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:21,706 INFO L85 PathProgramCache]: Analyzing trace with hash 742732929, now seen corresponding path program 1 times [2023-11-26 11:52:21,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:52:21,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245948170] [2023-11-26 11:52:21,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:21,706 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 [2023-11-26 11:52:21,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:52:21,707 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:52:21,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:21,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:52:21,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:21,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-26 11:52:21,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:21,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 11:52:21,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:21,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 11:52:21,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:21,865 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 [2023-11-26 11:52:21,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:21,886 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 [2023-11-26 11:52:21,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:21,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 11:52:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:22,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:22,083 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:52:22,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245948170] [2023-11-26 11:52:22,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245948170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:22,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:22,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:52:22,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412186421] [2023-11-26 11:52:22,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:22,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:52:22,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:52:22,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:52:22,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:52:22,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 50 [2023-11-26 11:52:22,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:22,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:22,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 50 [2023-11-26 11:52:22,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:22,471 INFO L124 PetriNetUnfolderBase]: 174/373 cut-off events. [2023-11-26 11:52:22,471 INFO L125 PetriNetUnfolderBase]: For 14/17 co-relation queries the response was YES. [2023-11-26 11:52:22,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 735 conditions, 373 events. 174/373 cut-off events. For 14/17 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1798 event pairs, 60 based on Foata normal form. 9/295 useless extension candidates. Maximal degree in co-relation 719. Up to 206 conditions per place. [2023-11-26 11:52:22,474 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 39 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2023-11-26 11:52:22,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 57 transitions, 279 flow [2023-11-26 11:52:22,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:52:22,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:52:22,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2023-11-26 11:52:22,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2023-11-26 11:52:22,476 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 129 transitions. [2023-11-26 11:52:22,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 129 transitions. [2023-11-26 11:52:22,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:22,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 129 transitions. [2023-11-26 11:52:22,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:22,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:22,478 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:22,478 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 158 flow. Second operand 4 states and 129 transitions. [2023-11-26 11:52:22,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 57 transitions, 279 flow [2023-11-26 11:52:22,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 57 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:52:22,481 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 181 flow [2023-11-26 11:52:22,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-11-26 11:52:22,482 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 5 predicate places. [2023-11-26 11:52:22,482 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 181 flow [2023-11-26 11:52:22,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:22,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:22,483 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:22,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:22,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:52:22,694 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 11:52:22,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:22,694 INFO L85 PathProgramCache]: Analyzing trace with hash -914370231, now seen corresponding path program 1 times [2023-11-26 11:52:22,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:52:22,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259410993] [2023-11-26 11:52:22,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:22,695 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 [2023-11-26 11:52:22,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:52:22,696 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:52:22,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:22,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 11:52:22,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:22,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-26 11:52:22,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:22,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 11:52:22,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:22,843 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 [2023-11-26 11:52:22,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:22,855 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 [2023-11-26 11:52:22,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:22,869 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 [2023-11-26 11:52:22,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:22,878 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 [2023-11-26 11:52:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:23,145 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:23,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:52:23,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259410993] [2023-11-26 11:52:23,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259410993] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:23,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:23,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:52:23,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929223891] [2023-11-26 11:52:23,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:23,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:52:23,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:52:23,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:52:23,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:52:23,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 50 [2023-11-26 11:52:23,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 181 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:23,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:23,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 50 [2023-11-26 11:52:23,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:23,619 INFO L124 PetriNetUnfolderBase]: 215/494 cut-off events. [2023-11-26 11:52:23,619 INFO L125 PetriNetUnfolderBase]: For 58/63 co-relation queries the response was YES. [2023-11-26 11:52:23,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1025 conditions, 494 events. 215/494 cut-off events. For 58/63 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2740 event pairs, 175 based on Foata normal form. 10/393 useless extension candidates. Maximal degree in co-relation 1008. Up to 307 conditions per place. [2023-11-26 11:52:23,623 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 42 selfloop transitions, 3 changer transitions 2/58 dead transitions. [2023-11-26 11:52:23,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 58 transitions, 305 flow [2023-11-26 11:52:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:52:23,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:52:23,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2023-11-26 11:52:23,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2023-11-26 11:52:23,625 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 130 transitions. [2023-11-26 11:52:23,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 130 transitions. [2023-11-26 11:52:23,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:23,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 130 transitions. [2023-11-26 11:52:23,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:23,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:23,627 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:23,627 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 181 flow. Second operand 4 states and 130 transitions. [2023-11-26 11:52:23,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 58 transitions, 305 flow [2023-11-26 11:52:23,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:52:23,630 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 182 flow [2023-11-26 11:52:23,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2023-11-26 11:52:23,631 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2023-11-26 11:52:23,632 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 182 flow [2023-11-26 11:52:23,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:23,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:23,632 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-26 11:52:23,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:23,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:52:23,836 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 11:52:23,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:23,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1283936234, now seen corresponding path program 2 times [2023-11-26 11:52:23,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:52:23,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307390941] [2023-11-26 11:52:23,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:52:23,837 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 [2023-11-26 11:52:23,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:52:23,838 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:52:23,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:23,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:52:23,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:23,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:52:23,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:23,973 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 [2023-11-26 11:52:23,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:23,985 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 [2023-11-26 11:52:23,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:23,995 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 [2023-11-26 11:52:24,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:24,009 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 [2023-11-26 11:52:24,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:24,034 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 [2023-11-26 11:52:24,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:24,048 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 [2023-11-26 11:52:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:24,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:25,557 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:52:25,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307390941] [2023-11-26 11:52:25,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307390941] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:25,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:52:25,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-26 11:52:25,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091350593] [2023-11-26 11:52:25,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:25,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:52:25,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:52:25,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:52:25,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:52:27,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 50 [2023-11-26 11:52:27,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 182 flow. Second operand has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:27,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:27,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 50 [2023-11-26 11:52:27,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:31,459 INFO L124 PetriNetUnfolderBase]: 221/504 cut-off events. [2023-11-26 11:52:31,459 INFO L125 PetriNetUnfolderBase]: For 94/100 co-relation queries the response was YES. [2023-11-26 11:52:31,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 504 events. 221/504 cut-off events. For 94/100 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2771 event pairs, 175 based on Foata normal form. 6/397 useless extension candidates. Maximal degree in co-relation 1075. Up to 397 conditions per place. [2023-11-26 11:52:31,463 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 22 selfloop transitions, 31 changer transitions 0/63 dead transitions. [2023-11-26 11:52:31,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 63 transitions, 390 flow [2023-11-26 11:52:31,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-26 11:52:31,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-26 11:52:31,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 542 transitions. [2023-11-26 11:52:31,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49272727272727274 [2023-11-26 11:52:31,470 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 542 transitions. [2023-11-26 11:52:31,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 542 transitions. [2023-11-26 11:52:31,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:31,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 542 transitions. [2023-11-26 11:52:31,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 24.636363636363637) internal successors, (542), 22 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:31,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 50.0) internal successors, (1150), 23 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:31,479 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 50.0) internal successors, (1150), 23 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:31,479 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 182 flow. Second operand 22 states and 542 transitions. [2023-11-26 11:52:31,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 63 transitions, 390 flow [2023-11-26 11:52:31,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 63 transitions, 385 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:52:31,483 INFO L231 Difference]: Finished difference. Result has 81 places, 63 transitions, 371 flow [2023-11-26 11:52:31,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=371, PETRI_PLACES=81, PETRI_TRANSITIONS=63} [2023-11-26 11:52:31,484 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2023-11-26 11:52:31,484 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 63 transitions, 371 flow [2023-11-26 11:52:31,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:31,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:31,485 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:31,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:31,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:52:31,689 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 11:52:31,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:31,690 INFO L85 PathProgramCache]: Analyzing trace with hash -991186364, now seen corresponding path program 1 times [2023-11-26 11:52:31,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:52:31,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724307142] [2023-11-26 11:52:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:31,691 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 [2023-11-26 11:52:31,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:52:31,692 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:52:31,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:31,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 11:52:31,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:31,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-26 11:52:31,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:31,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 11:52:31,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:31,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 11:52:31,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:31,862 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 [2023-11-26 11:52:31,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:31,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 11:52:31,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:31,899 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 [2023-11-26 11:52:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:52:32,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:52:33,690 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:52:33,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724307142] [2023-11-26 11:52:33,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724307142] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:33,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:52:33,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-26 11:52:33,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630856971] [2023-11-26 11:52:33,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:33,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:52:33,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:52:33,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:52:33,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:52:34,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 50 [2023-11-26 11:52:34,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 63 transitions, 371 flow. Second operand has 8 states, 8 states have (on average 25.25) internal successors, (202), 8 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:34,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:34,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 50 [2023-11-26 11:52:34,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:39,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:52:43,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:52:47,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:52:48,086 INFO L124 PetriNetUnfolderBase]: 471/992 cut-off events. [2023-11-26 11:52:48,086 INFO L125 PetriNetUnfolderBase]: For 121/127 co-relation queries the response was YES. [2023-11-26 11:52:48,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2149 conditions, 992 events. 471/992 cut-off events. For 121/127 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5700 event pairs, 99 based on Foata normal form. 0/779 useless extension candidates. Maximal degree in co-relation 2125. Up to 228 conditions per place. [2023-11-26 11:52:48,094 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 89 selfloop transitions, 19 changer transitions 0/119 dead transitions. [2023-11-26 11:52:48,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 119 transitions, 727 flow [2023-11-26 11:52:48,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:52:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:52:48,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 243 transitions. [2023-11-26 11:52:48,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6942857142857143 [2023-11-26 11:52:48,097 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 243 transitions. [2023-11-26 11:52:48,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 243 transitions. [2023-11-26 11:52:48,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:48,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 243 transitions. [2023-11-26 11:52:48,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 34.714285714285715) internal successors, (243), 7 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:48,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 50.0) internal successors, (400), 8 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:48,101 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 50.0) internal successors, (400), 8 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:48,101 INFO L175 Difference]: Start difference. First operand has 81 places, 63 transitions, 371 flow. Second operand 7 states and 243 transitions. [2023-11-26 11:52:48,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 119 transitions, 727 flow [2023-11-26 11:52:48,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 119 transitions, 647 flow, removed 27 selfloop flow, removed 9 redundant places. [2023-11-26 11:52:48,107 INFO L231 Difference]: Finished difference. Result has 81 places, 69 transitions, 375 flow [2023-11-26 11:52:48,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=375, PETRI_PLACES=81, PETRI_TRANSITIONS=69} [2023-11-26 11:52:48,108 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2023-11-26 11:52:48,108 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 69 transitions, 375 flow [2023-11-26 11:52:48,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.25) internal successors, (202), 8 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:48,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:48,109 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:48,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:48,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:52:48,312 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 11:52:48,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:48,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1026695322, now seen corresponding path program 1 times [2023-11-26 11:52:48,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:52:48,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36918649] [2023-11-26 11:52:48,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:48,313 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 [2023-11-26 11:52:48,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:52:48,315 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:52:48,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:48,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:52:48,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:52:48,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:48,753 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 38 treesize of output 34 [2023-11-26 11:52:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:52:49,591 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:52:49,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36918649] [2023-11-26 11:52:49,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36918649] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:49,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:52:49,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-26 11:52:49,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055091266] [2023-11-26 11:52:49,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:49,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:52:49,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:52:49,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:52:49,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:52:50,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 50 [2023-11-26 11:52:50,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 69 transitions, 375 flow. Second operand has 10 states, 10 states have (on average 25.6) internal successors, (256), 10 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:50,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:50,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 50 [2023-11-26 11:52:50,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:54,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:52:55,899 INFO L124 PetriNetUnfolderBase]: 756/1579 cut-off events. [2023-11-26 11:52:55,899 INFO L125 PetriNetUnfolderBase]: For 1077/1083 co-relation queries the response was YES. [2023-11-26 11:52:55,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3826 conditions, 1579 events. 756/1579 cut-off events. For 1077/1083 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10039 event pairs, 131 based on Foata normal form. 71/1403 useless extension candidates. Maximal degree in co-relation 3799. Up to 273 conditions per place. [2023-11-26 11:52:55,910 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 144 selfloop transitions, 29 changer transitions 0/184 dead transitions. [2023-11-26 11:52:55,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 184 transitions, 1062 flow [2023-11-26 11:52:55,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:52:55,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 11:52:55,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 423 transitions. [2023-11-26 11:52:55,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.705 [2023-11-26 11:52:55,920 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 423 transitions. [2023-11-26 11:52:55,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 423 transitions. [2023-11-26 11:52:55,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:55,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 423 transitions. [2023-11-26 11:52:55,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 35.25) internal successors, (423), 12 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:55,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 50.0) internal successors, (650), 13 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:55,926 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 50.0) internal successors, (650), 13 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:55,926 INFO L175 Difference]: Start difference. First operand has 81 places, 69 transitions, 375 flow. Second operand 12 states and 423 transitions. [2023-11-26 11:52:55,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 184 transitions, 1062 flow [2023-11-26 11:52:55,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 184 transitions, 1026 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-26 11:52:55,935 INFO L231 Difference]: Finished difference. Result has 96 places, 79 transitions, 502 flow [2023-11-26 11:52:55,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=502, PETRI_PLACES=96, PETRI_TRANSITIONS=79} [2023-11-26 11:52:55,936 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 47 predicate places. [2023-11-26 11:52:55,936 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 79 transitions, 502 flow [2023-11-26 11:52:55,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.6) internal successors, (256), 10 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:55,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:55,937 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:55,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-11-26 11:52:56,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:52:56,139 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 11:52:56,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:56,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1026212745, now seen corresponding path program 1 times [2023-11-26 11:52:56,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:52:56,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108569142] [2023-11-26 11:52:56,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:56,141 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 [2023-11-26 11:52:56,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:52:56,142 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:52:56,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-26 11:52:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:56,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:52:56,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:56,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:52:56,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:52:56,402 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:52:56,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108569142] [2023-11-26 11:52:56,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108569142] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:56,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:52:56,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-26 11:52:56,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011558707] [2023-11-26 11:52:56,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:56,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:52:56,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:52:56,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:52:56,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:52:56,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 50 [2023-11-26 11:52:56,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 79 transitions, 502 flow. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:56,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:56,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 50 [2023-11-26 11:52:56,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:56,992 INFO L124 PetriNetUnfolderBase]: 858/1798 cut-off events. [2023-11-26 11:52:56,992 INFO L125 PetriNetUnfolderBase]: For 3169/3175 co-relation queries the response was YES. [2023-11-26 11:52:56,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4769 conditions, 1798 events. 858/1798 cut-off events. For 3169/3175 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11630 event pairs, 289 based on Foata normal form. 40/1557 useless extension candidates. Maximal degree in co-relation 4735. Up to 838 conditions per place. [2023-11-26 11:52:57,009 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 87 selfloop transitions, 10 changer transitions 0/108 dead transitions. [2023-11-26 11:52:57,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 108 transitions, 807 flow [2023-11-26 11:52:57,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:52:57,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:52:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2023-11-26 11:52:57,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.725 [2023-11-26 11:52:57,011 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 145 transitions. [2023-11-26 11:52:57,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 145 transitions. [2023-11-26 11:52:57,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:57,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 145 transitions. [2023-11-26 11:52:57,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:57,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:57,014 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:57,014 INFO L175 Difference]: Start difference. First operand has 96 places, 79 transitions, 502 flow. Second operand 4 states and 145 transitions. [2023-11-26 11:52:57,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 108 transitions, 807 flow [2023-11-26 11:52:57,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 108 transitions, 765 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-26 11:52:57,026 INFO L231 Difference]: Finished difference. Result has 97 places, 81 transitions, 523 flow [2023-11-26 11:52:57,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=523, PETRI_PLACES=97, PETRI_TRANSITIONS=81} [2023-11-26 11:52:57,027 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 48 predicate places. [2023-11-26 11:52:57,028 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 81 transitions, 523 flow [2023-11-26 11:52:57,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:57,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:57,028 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:57,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:57,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:52:57,232 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 11:52:57,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:57,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1296421862, now seen corresponding path program 2 times [2023-11-26 11:52:57,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:52:57,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534877147] [2023-11-26 11:52:57,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:52:57,233 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 [2023-11-26 11:52:57,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:52:57,234 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:52:57,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-26 11:52:57,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:52:57,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:57,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:52:57,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:57,379 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 [2023-11-26 11:52:57,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:57,396 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 [2023-11-26 11:52:57,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:57,409 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 [2023-11-26 11:52:57,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:57,417 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 [2023-11-26 11:52:57,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:57,436 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 [2023-11-26 11:52:57,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:57,444 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 [2023-11-26 11:52:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-26 11:52:57,835 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:57,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:52:57,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534877147] [2023-11-26 11:52:57,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534877147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:57,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:57,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:52:57,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011939044] [2023-11-26 11:52:57,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:57,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:52:57,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:52:57,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:52:57,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:52:57,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 50 [2023-11-26 11:52:57,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 81 transitions, 523 flow. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:57,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:57,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 50 [2023-11-26 11:52:57,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:58,509 INFO L124 PetriNetUnfolderBase]: 844/1754 cut-off events. [2023-11-26 11:52:58,510 INFO L125 PetriNetUnfolderBase]: For 3007/3013 co-relation queries the response was YES. [2023-11-26 11:52:58,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4807 conditions, 1754 events. 844/1754 cut-off events. For 3007/3013 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11344 event pairs, 446 based on Foata normal form. 10/1484 useless extension candidates. Maximal degree in co-relation 4770. Up to 911 conditions per place. [2023-11-26 11:52:58,529 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 65 selfloop transitions, 16 changer transitions 0/92 dead transitions. [2023-11-26 11:52:58,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 92 transitions, 719 flow [2023-11-26 11:52:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:52:58,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:52:58,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2023-11-26 11:52:58,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2023-11-26 11:52:58,531 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 126 transitions. [2023-11-26 11:52:58,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 126 transitions. [2023-11-26 11:52:58,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:58,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 126 transitions. [2023-11-26 11:52:58,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:58,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:58,536 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:58,536 INFO L175 Difference]: Start difference. First operand has 97 places, 81 transitions, 523 flow. Second operand 4 states and 126 transitions. [2023-11-26 11:52:58,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 92 transitions, 719 flow [2023-11-26 11:52:58,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 92 transitions, 715 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-26 11:52:58,555 INFO L231 Difference]: Finished difference. Result has 101 places, 81 transitions, 568 flow [2023-11-26 11:52:58,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=568, PETRI_PLACES=101, PETRI_TRANSITIONS=81} [2023-11-26 11:52:58,556 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 52 predicate places. [2023-11-26 11:52:58,556 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 81 transitions, 568 flow [2023-11-26 11:52:58,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:58,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:58,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:58,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:58,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:52:58,773 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 11:52:58,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:58,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1148339602, now seen corresponding path program 1 times [2023-11-26 11:52:58,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:52:58,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633052988] [2023-11-26 11:52:58,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:58,774 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 [2023-11-26 11:52:58,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:52:58,775 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:52:58,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-26 11:52:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:58,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:52:58,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:58,920 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:58,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:52:58,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633052988] [2023-11-26 11:52:58,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633052988] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:58,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:58,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:52:58,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043328544] [2023-11-26 11:52:58,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:58,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:52:58,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:52:58,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:52:58,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:58,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 50 [2023-11-26 11:52:58,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 81 transitions, 568 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:58,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:58,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 50 [2023-11-26 11:52:58,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:59,310 INFO L124 PetriNetUnfolderBase]: 844/1742 cut-off events. [2023-11-26 11:52:59,310 INFO L125 PetriNetUnfolderBase]: For 3284/3290 co-relation queries the response was YES. [2023-11-26 11:52:59,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4911 conditions, 1742 events. 844/1742 cut-off events. For 3284/3290 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11230 event pairs, 446 based on Foata normal form. 6/1468 useless extension candidates. Maximal degree in co-relation 4871. Up to 911 conditions per place. [2023-11-26 11:52:59,324 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 71 selfloop transitions, 5 changer transitions 4/91 dead transitions. [2023-11-26 11:52:59,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 91 transitions, 760 flow [2023-11-26 11:52:59,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:52:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:52:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2023-11-26 11:52:59,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2023-11-26 11:52:59,326 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 102 transitions. [2023-11-26 11:52:59,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 102 transitions. [2023-11-26 11:52:59,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:59,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 102 transitions. [2023-11-26 11:52:59,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:59,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:59,328 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:59,329 INFO L175 Difference]: Start difference. First operand has 101 places, 81 transitions, 568 flow. Second operand 3 states and 102 transitions. [2023-11-26 11:52:59,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 91 transitions, 760 flow [2023-11-26 11:52:59,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 91 transitions, 728 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:52:59,349 INFO L231 Difference]: Finished difference. Result has 101 places, 80 transitions, 543 flow [2023-11-26 11:52:59,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=543, PETRI_PLACES=101, PETRI_TRANSITIONS=80} [2023-11-26 11:52:59,351 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 52 predicate places. [2023-11-26 11:52:59,351 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 80 transitions, 543 flow [2023-11-26 11:52:59,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:59,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:59,352 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:59,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:59,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:52:59,555 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 11:52:59,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:59,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1818245334, now seen corresponding path program 1 times [2023-11-26 11:52:59,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:52:59,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129023769] [2023-11-26 11:52:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:59,555 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 [2023-11-26 11:52:59,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:52:59,556 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:52:59,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf0a894-b09f-434f-a3c8-3a7da0bd4540/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-26 11:52:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:59,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:52:59,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:59,749 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 [2023-11-26 11:52:59,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:59,769 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 [2023-11-26 11:52:59,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:59,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 11:52:59,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:59,792 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 8 treesize of output 1 [2023-11-26 11:52:59,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:59,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 11:52:59,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:59,815 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 [2023-11-26 11:53:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:00,440 INFO L327 TraceCheckSpWp]: Computing backward predicates...