./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.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_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ebdf94362dc31684fc6d7640230484df679da941d20fe978f9edfe1d75c48a51 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:01:59,022 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:01:59,089 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 00:01:59,093 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:01:59,094 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:01:59,117 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:01:59,118 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:01:59,118 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:01:59,119 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:01:59,119 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:01:59,120 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:01:59,121 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:01:59,121 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:01:59,122 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:01:59,122 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:01:59,123 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:01:59,123 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:01:59,124 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:01:59,125 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:01:59,125 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:01:59,126 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:01:59,129 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:01:59,129 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:01:59,130 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:01:59,130 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:01:59,130 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:01:59,131 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:01:59,131 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:01:59,132 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:01:59,132 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:01:59,132 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:01:59,133 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:01:59,133 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:01:59,133 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:01:59,134 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:01:59,134 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:01:59,134 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:01:59,134 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:01:59,134 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:01:59,135 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:01:59,135 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:01:59,135 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_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebdf94362dc31684fc6d7640230484df679da941d20fe978f9edfe1d75c48a51 [2023-11-29 00:01:59,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:01:59,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:01:59,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:01:59,394 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:01:59,395 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:01:59,396 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2023-11-29 00:02:02,200 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:02:02,376 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:02:02,377 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2023-11-29 00:02:02,385 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/data/b7a58cc24/0a4d8415d8a44d4ea20a35500fa2a069/FLAG63012d471 [2023-11-29 00:02:02,399 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/data/b7a58cc24/0a4d8415d8a44d4ea20a35500fa2a069 [2023-11-29 00:02:02,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:02:02,404 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:02:02,405 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:02:02,405 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:02:02,411 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:02:02,412 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:02:02" (1/1) ... [2023-11-29 00:02:02,413 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73815cd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:02, skipping insertion in model container [2023-11-29 00:02:02,414 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:02:02" (1/1) ... [2023-11-29 00:02:02,446 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:02:02,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:02:02,660 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-29 00:02:02,661 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6e30cc55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:02, skipping insertion in model container [2023-11-29 00:02:02,661 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:02:02,662 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-29 00:02:02,663 INFO L158 Benchmark]: Toolchain (without parser) took 259.15ms. Allocated memory is still 142.6MB. Free memory was 105.1MB in the beginning and 95.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 00:02:02,664 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 142.6MB. Free memory is still 114.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 00:02:02,665 INFO L158 Benchmark]: CACSL2BoogieTranslator took 256.49ms. Allocated memory is still 142.6MB. Free memory was 105.1MB in the beginning and 95.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 00:02:02,666 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 142.6MB. Free memory is still 114.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 256.49ms. Allocated memory is still 142.6MB. Free memory was 105.1MB in the beginning and 95.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 96]: 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_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ebdf94362dc31684fc6d7640230484df679da941d20fe978f9edfe1d75c48a51 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:02:04,434 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:02:04,500 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 00:02:04,513 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:02:04,515 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:02:04,544 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:02:04,545 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:02:04,545 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:02:04,546 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:02:04,547 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:02:04,547 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:02:04,548 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:02:04,549 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:02:04,549 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:02:04,550 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:02:04,551 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:02:04,551 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:02:04,552 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:02:04,552 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:02:04,552 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:02:04,553 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:02:04,554 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:02:04,555 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:02:04,555 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:02:04,556 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:02:04,556 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 00:02:04,556 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 00:02:04,557 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:02:04,557 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:02:04,557 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:02:04,558 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:02:04,558 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:02:04,559 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:02:04,559 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:02:04,559 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:02:04,559 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:02:04,560 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:02:04,560 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 00:02:04,560 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 00:02:04,560 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:02:04,561 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:02:04,561 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:02:04,561 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:02:04,561 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 00:02:04,562 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_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebdf94362dc31684fc6d7640230484df679da941d20fe978f9edfe1d75c48a51 [2023-11-29 00:02:04,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:02:04,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:02:04,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:02:04,893 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:02:04,894 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:02:04,895 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2023-11-29 00:02:07,802 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:02:08,004 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:02:08,005 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2023-11-29 00:02:08,014 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/data/ce2262d19/57942fbdb88649bfb15b206800fd3ebe/FLAGfd69bf1d0 [2023-11-29 00:02:08,028 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/data/ce2262d19/57942fbdb88649bfb15b206800fd3ebe [2023-11-29 00:02:08,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:02:08,033 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:02:08,034 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:02:08,034 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:02:08,040 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:02:08,040 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:02:08" (1/1) ... [2023-11-29 00:02:08,041 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d7ecff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:08, skipping insertion in model container [2023-11-29 00:02:08,042 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:02:08" (1/1) ... [2023-11-29 00:02:08,065 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:02:08,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:02:08,250 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 00:02:08,256 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:02:08,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:02:08,282 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:02:08,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:02:08,319 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:02:08,319 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:02:08,326 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:02:08,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:08 WrapperNode [2023-11-29 00:02:08,327 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:02:08,328 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:02:08,328 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:02:08,328 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:02:08,336 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:08" (1/1) ... [2023-11-29 00:02:08,348 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:08" (1/1) ... [2023-11-29 00:02:08,377 INFO L138 Inliner]: procedures = 28, calls = 41, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 148 [2023-11-29 00:02:08,377 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:02:08,378 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:02:08,378 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:02:08,378 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:02:08,388 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:08" (1/1) ... [2023-11-29 00:02:08,388 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:08" (1/1) ... [2023-11-29 00:02:08,393 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:08" (1/1) ... [2023-11-29 00:02:08,413 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]. [2023-11-29 00:02:08,413 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:08" (1/1) ... [2023-11-29 00:02:08,413 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:08" (1/1) ... [2023-11-29 00:02:08,428 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:08" (1/1) ... [2023-11-29 00:02:08,433 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:08" (1/1) ... [2023-11-29 00:02:08,436 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:08" (1/1) ... [2023-11-29 00:02:08,438 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:08" (1/1) ... [2023-11-29 00:02:08,443 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:02:08,444 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:02:08,444 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:02:08,444 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:02:08,445 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:08" (1/1) ... [2023-11-29 00:02:08,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:02:08,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:02:08,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:02:08,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:02:08,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:02:08,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 00:02:08,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 00:02:08,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 00:02:08,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 00:02:08,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:02:08,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 00:02:08,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 00:02:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 00:02:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 00:02:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 00:02:08,532 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 00:02:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 00:02:08,532 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 00:02:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 00:02:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 00:02:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 00:02:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:02:08,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:02:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:02:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 00:02:08,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 00:02:08,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 00:02:08,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 00:02:08,536 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 00:02:08,658 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:02:08,661 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:02:09,075 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:02:09,367 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:02:09,367 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 00:02:09,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:02:09 BoogieIcfgContainer [2023-11-29 00:02:09,368 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:02:09,370 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:02:09,370 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:02:09,373 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:02:09,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:02:08" (1/3) ... [2023-11-29 00:02:09,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1327fc71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:02:09, skipping insertion in model container [2023-11-29 00:02:09,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:08" (2/3) ... [2023-11-29 00:02:09,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1327fc71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:02:09, skipping insertion in model container [2023-11-29 00:02:09,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:02:09" (3/3) ... [2023-11-29 00:02:09,376 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2023-11-29 00:02:09,398 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:02:09,399 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-29 00:02:09,399 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:02:09,488 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 00:02:09,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 48 transitions, 110 flow [2023-11-29 00:02:09,560 INFO L124 PetriNetUnfolderBase]: 3/46 cut-off events. [2023-11-29 00:02:09,560 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:02:09,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 3/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-11-29 00:02:09,564 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 48 transitions, 110 flow [2023-11-29 00:02:09,568 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 45 transitions, 102 flow [2023-11-29 00:02:09,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:02:09,587 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;@71c693f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:02:09,587 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-29 00:02:09,592 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:02:09,592 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-29 00:02:09,592 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:02:09,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:02:09,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:02:09,593 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:02:09,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:09,599 INFO L85 PathProgramCache]: Analyzing trace with hash 479407, now seen corresponding path program 1 times [2023-11-29 00:02:09,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:02:09,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462240518] [2023-11-29 00:02:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:09,612 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:09,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:02:09,640 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:02:09,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-29 00:02:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:09,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:02:09,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:09,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:02:09,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:09,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:02:09,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:09,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:02:09,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:09,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:02:09,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:09,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:02:09,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:09,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:02:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:09,920 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:09,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:02:09,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462240518] [2023-11-29 00:02:09,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462240518] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:09,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:09,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:02:09,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602870056] [2023-11-29 00:02:09,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:09,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:02:09,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:02:09,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:02:09,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:02:10,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-29 00:02:10,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 102 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) [2023-11-29 00:02:10,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:02:10,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-29 00:02:10,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:02:10,269 INFO L124 PetriNetUnfolderBase]: 128/359 cut-off events. [2023-11-29 00:02:10,269 INFO L125 PetriNetUnfolderBase]: For 29/30 co-relation queries the response was YES. [2023-11-29 00:02:10,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 359 events. 128/359 cut-off events. For 29/30 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2151 event pairs, 100 based on Foata normal form. 1/215 useless extension candidates. Maximal degree in co-relation 531. Up to 221 conditions per place. [2023-11-29 00:02:10,276 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 21 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-11-29 00:02:10,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 142 flow [2023-11-29 00:02:10,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:02:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:02:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2023-11-29 00:02:10,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6319444444444444 [2023-11-29 00:02:10,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 91 transitions. [2023-11-29 00:02:10,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 91 transitions. [2023-11-29 00:02:10,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:02:10,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 91 transitions. [2023-11-29 00:02:10,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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) [2023-11-29 00:02:10,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:10,301 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:10,303 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 102 flow. Second operand 3 states and 91 transitions. [2023-11-29 00:02:10,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 142 flow [2023-11-29 00:02:10,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 134 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 00:02:10,310 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 92 flow [2023-11-29 00:02:10,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, 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} [2023-11-29 00:02:10,316 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-11-29 00:02:10,317 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 92 flow [2023-11-29 00:02:10,317 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) [2023-11-29 00:02:10,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:02:10,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:02:10,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:02:10,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:10,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:02:10,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:10,519 INFO L85 PathProgramCache]: Analyzing trace with hash 479408, now seen corresponding path program 1 times [2023-11-29 00:02:10,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:02:10,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440238961] [2023-11-29 00:02:10,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:10,521 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:10,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:02:10,522 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:02:10,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-29 00:02:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:10,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:02:10,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:10,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:02:10,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:10,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:10,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:10,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:10,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:10,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:02:10,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:10,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:02:10,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:10,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:10,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:10,824 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:10,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:02:10,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440238961] [2023-11-29 00:02:10,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440238961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:10,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:10,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:02:10,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236770953] [2023-11-29 00:02:10,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:10,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:02:10,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:02:10,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:02:10,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:02:10,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-29 00:02:10,984 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) [2023-11-29 00:02:10,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:02:10,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-29 00:02:10,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:02:11,283 INFO L124 PetriNetUnfolderBase]: 129/362 cut-off events. [2023-11-29 00:02:11,283 INFO L125 PetriNetUnfolderBase]: For 7/8 co-relation queries the response was YES. [2023-11-29 00:02:11,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 362 events. 129/362 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2158 event pairs, 100 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 580. Up to 226 conditions per place. [2023-11-29 00:02:11,287 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 23 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2023-11-29 00:02:11,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 154 flow [2023-11-29 00:02:11,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:02:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:02:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2023-11-29 00:02:11,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2023-11-29 00:02:11,290 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 116 transitions. [2023-11-29 00:02:11,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 116 transitions. [2023-11-29 00:02:11,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:02:11,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 116 transitions. [2023-11-29 00:02:11,292 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) [2023-11-29 00:02:11,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:11,293 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:11,294 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 92 flow. Second operand 4 states and 116 transitions. [2023-11-29 00:02:11,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 154 flow [2023-11-29 00:02:11,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 148 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:02:11,296 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 115 flow [2023-11-29 00:02:11,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, 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} [2023-11-29 00:02:11,297 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-11-29 00:02:11,298 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 115 flow [2023-11-29 00:02:11,298 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) [2023-11-29 00:02:11,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:02:11,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:02:11,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-29 00:02:11,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:11,499 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:02:11,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:11,499 INFO L85 PathProgramCache]: Analyzing trace with hash 479457, now seen corresponding path program 1 times [2023-11-29 00:02:11,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:02:11,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612478691] [2023-11-29 00:02:11,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:11,500 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:11,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:02:11,501 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:02:11,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-29 00:02:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:11,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:02:11,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:11,589 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 00:02:11,589 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 [2023-11-29 00:02:11,622 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 00:02:11,622 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 [2023-11-29 00:02:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:11,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:11,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:02:11,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612478691] [2023-11-29 00:02:11,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612478691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:11,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:11,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:02:11,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059487344] [2023-11-29 00:02:11,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:11,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:02:11,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:02:11,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:02:11,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:02:11,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2023-11-29 00:02:11,758 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) [2023-11-29 00:02:11,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:02:11,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2023-11-29 00:02:11,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:02:11,928 INFO L124 PetriNetUnfolderBase]: 201/413 cut-off events. [2023-11-29 00:02:11,928 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 00:02:11,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 413 events. 201/413 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2081 event pairs, 160 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 747. Up to 335 conditions per place. [2023-11-29 00:02:11,933 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 27 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-11-29 00:02:11,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 167 flow [2023-11-29 00:02:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:02:11,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:02:11,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2023-11-29 00:02:11,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-29 00:02:11,935 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 84 transitions. [2023-11-29 00:02:11,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 84 transitions. [2023-11-29 00:02:11,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:02:11,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 84 transitions. [2023-11-29 00:02:11,936 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) [2023-11-29 00:02:11,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:11,938 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:11,938 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 115 flow. Second operand 3 states and 84 transitions. [2023-11-29 00:02:11,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 167 flow [2023-11-29 00:02:11,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:02:11,940 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 110 flow [2023-11-29 00:02:11,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, 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} [2023-11-29 00:02:11,941 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2023-11-29 00:02:11,941 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 110 flow [2023-11-29 00:02:11,941 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) [2023-11-29 00:02:11,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:02:11,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:02:11,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-29 00:02:12,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:12,142 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:02:12,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:12,143 INFO L85 PathProgramCache]: Analyzing trace with hash 479458, now seen corresponding path program 1 times [2023-11-29 00:02:12,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:02:12,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165775909] [2023-11-29 00:02:12,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:12,144 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:12,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:02:12,145 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:02:12,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-29 00:02:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:12,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:02:12,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:12,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:12,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:12,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 00:02:12,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 00:02:12,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:12,298 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 11 treesize of output 5 [2023-11-29 00:02:12,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:12,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:02:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:12,435 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:12,435 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:02:12,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165775909] [2023-11-29 00:02:12,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165775909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:12,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:12,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:02:12,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593640445] [2023-11-29 00:02:12,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:12,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:02:12,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:02:12,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:02:12,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:02:12,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2023-11-29 00:02:12,529 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) [2023-11-29 00:02:12,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:02:12,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2023-11-29 00:02:12,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:02:12,723 INFO L124 PetriNetUnfolderBase]: 129/300 cut-off events. [2023-11-29 00:02:12,723 INFO L125 PetriNetUnfolderBase]: For 7/8 co-relation queries the response was YES. [2023-11-29 00:02:12,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548 conditions, 300 events. 129/300 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1483 event pairs, 100 based on Foata normal form. 37/254 useless extension candidates. Maximal degree in co-relation 539. Up to 226 conditions per place. [2023-11-29 00:02:12,726 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 25 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-29 00:02:12,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 158 flow [2023-11-29 00:02:12,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:02:12,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:02:12,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-29 00:02:12,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2023-11-29 00:02:12,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-29 00:02:12,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-29 00:02:12,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:02:12,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-29 00:02:12,730 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) [2023-11-29 00:02:12,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:12,731 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:12,731 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 110 flow. Second operand 3 states and 88 transitions. [2023-11-29 00:02:12,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 158 flow [2023-11-29 00:02:12,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:02:12,733 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 107 flow [2023-11-29 00:02:12,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, 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} [2023-11-29 00:02:12,734 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2023-11-29 00:02:12,734 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 107 flow [2023-11-29 00:02:12,734 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) [2023-11-29 00:02:12,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:02:12,734 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-29 00:02:12,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-29 00:02:12,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:12,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:02:12,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:12,935 INFO L85 PathProgramCache]: Analyzing trace with hash 460725372, now seen corresponding path program 1 times [2023-11-29 00:02:12,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:02:12,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105947721] [2023-11-29 00:02:12,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:12,936 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:12,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:02:12,937 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:02:12,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-29 00:02:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:12,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:02:12,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:13,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:02:13,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:13,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:13,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:13,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:13,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:13,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:02:13,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:13,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:02:13,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:13,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:13,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:02:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:13,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:02:13,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105947721] [2023-11-29 00:02:13,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105947721] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:02:13,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:02:13,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 00:02:13,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407055927] [2023-11-29 00:02:13,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:02:13,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:02:13,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:02:13,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:02:13,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:02:14,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-29 00:02:14,111 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) [2023-11-29 00:02:14,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:02:14,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-29 00:02:14,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:02:14,763 INFO L124 PetriNetUnfolderBase]: 132/309 cut-off events. [2023-11-29 00:02:14,763 INFO L125 PetriNetUnfolderBase]: For 7/8 co-relation queries the response was YES. [2023-11-29 00:02:14,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 309 events. 132/309 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1525 event pairs, 100 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 567. Up to 229 conditions per place. [2023-11-29 00:02:14,767 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 23 selfloop transitions, 13 changer transitions 0/50 dead transitions. [2023-11-29 00:02:14,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 215 flow [2023-11-29 00:02:14,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:02:14,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 00:02:14,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2023-11-29 00:02:14,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5395833333333333 [2023-11-29 00:02:14,771 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 259 transitions. [2023-11-29 00:02:14,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 259 transitions. [2023-11-29 00:02:14,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:02:14,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 259 transitions. [2023-11-29 00:02:14,773 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) [2023-11-29 00:02:14,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 48.0) internal successors, (528), 11 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:14,776 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 48.0) internal successors, (528), 11 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:14,776 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 107 flow. Second operand 10 states and 259 transitions. [2023-11-29 00:02:14,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 215 flow [2023-11-29 00:02:14,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:02:14,778 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 186 flow [2023-11-29 00:02:14,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, 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} [2023-11-29 00:02:14,779 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2023-11-29 00:02:14,780 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 186 flow [2023-11-29 00:02:14,780 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) [2023-11-29 00:02:14,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:02:14,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 00:02:14,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-29 00:02:14,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:14,981 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:02:14,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:14,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1399044574, now seen corresponding path program 1 times [2023-11-29 00:02:14,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:02:14,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497518643] [2023-11-29 00:02:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:14,982 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:14,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:02:14,983 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:02:14,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-29 00:02:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:15,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:02:15,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:15,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:15,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 00:02:15,060 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 10 treesize of output 8 [2023-11-29 00:02:15,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:15,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:15,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:02:15,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:15,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:15,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:02:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:15,121 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:15,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:02:15,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497518643] [2023-11-29 00:02:15,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497518643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:15,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:15,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:02:15,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800497101] [2023-11-29 00:02:15,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:15,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:02:15,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:02:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:02:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:02:15,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2023-11-29 00:02:15,167 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) [2023-11-29 00:02:15,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:02:15,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2023-11-29 00:02:15,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:02:15,272 INFO L124 PetriNetUnfolderBase]: 132/303 cut-off events. [2023-11-29 00:02:15,272 INFO L125 PetriNetUnfolderBase]: For 16/17 co-relation queries the response was YES. [2023-11-29 00:02:15,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 303 events. 132/303 cut-off events. For 16/17 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1469 event pairs, 100 based on Foata normal form. 11/237 useless extension candidates. Maximal degree in co-relation 581. Up to 235 conditions per place. [2023-11-29 00:02:15,275 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 34 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-11-29 00:02:15,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 48 transitions, 252 flow [2023-11-29 00:02:15,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:02:15,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:02:15,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-29 00:02:15,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2023-11-29 00:02:15,277 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-29 00:02:15,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-29 00:02:15,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:02:15,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-29 00:02:15,278 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) [2023-11-29 00:02:15,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:15,279 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:15,279 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 186 flow. Second operand 3 states and 88 transitions. [2023-11-29 00:02:15,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 48 transitions, 252 flow [2023-11-29 00:02:15,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 222 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-29 00:02:15,282 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 154 flow [2023-11-29 00:02:15,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, 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} [2023-11-29 00:02:15,283 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2023-11-29 00:02:15,283 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 154 flow [2023-11-29 00:02:15,284 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) [2023-11-29 00:02:15,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:02:15,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 00:02:15,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-29 00:02:15,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:15,488 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:02:15,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:15,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1399044573, now seen corresponding path program 1 times [2023-11-29 00:02:15,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:02:15,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553973070] [2023-11-29 00:02:15,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:15,489 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:15,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:02:15,490 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:02:15,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-29 00:02:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:15,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:02:15,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:15,555 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 00:02:15,556 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 [2023-11-29 00:02:15,576 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 00:02:15,576 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 [2023-11-29 00:02:15,591 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 00:02:15,592 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 [2023-11-29 00:02:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:15,670 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:15,670 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:02:15,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553973070] [2023-11-29 00:02:15,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553973070] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:15,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:15,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:02:15,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373705145] [2023-11-29 00:02:15,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:15,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:02:15,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:02:15,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:02:15,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:02:15,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2023-11-29 00:02:15,717 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) [2023-11-29 00:02:15,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:02:15,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2023-11-29 00:02:15,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:02:15,840 INFO L124 PetriNetUnfolderBase]: 144/313 cut-off events. [2023-11-29 00:02:15,840 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-29 00:02:15,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 313 events. 144/313 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1484 event pairs, 110 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 601. Up to 259 conditions per place. [2023-11-29 00:02:15,843 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 36 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-29 00:02:15,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 46 transitions, 224 flow [2023-11-29 00:02:15,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:02:15,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:02:15,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2023-11-29 00:02:15,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-29 00:02:15,844 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 84 transitions. [2023-11-29 00:02:15,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 84 transitions. [2023-11-29 00:02:15,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:02:15,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 84 transitions. [2023-11-29 00:02:15,844 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) [2023-11-29 00:02:15,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:15,845 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:15,845 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 154 flow. Second operand 3 states and 84 transitions. [2023-11-29 00:02:15,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 46 transitions, 224 flow [2023-11-29 00:02:15,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 46 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:02:15,847 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 151 flow [2023-11-29 00:02:15,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, 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} [2023-11-29 00:02:15,848 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-11-29 00:02:15,848 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 151 flow [2023-11-29 00:02:15,848 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) [2023-11-29 00:02:15,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:02:15,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:02:15,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-29 00:02:16,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:16,049 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:02:16,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:16,049 INFO L85 PathProgramCache]: Analyzing trace with hash 420749007, now seen corresponding path program 1 times [2023-11-29 00:02:16,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:02:16,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974786203] [2023-11-29 00:02:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:16,050 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:16,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:02:16,051 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:02:16,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-29 00:02:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:16,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:02:16,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:16,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:02:16,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:16,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:02:16,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:16,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:02:16,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:16,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:02:16,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:16,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:02:16,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:16,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:02:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:16,163 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:16,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:02:16,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974786203] [2023-11-29 00:02:16,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974786203] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:16,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:16,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:02:16,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339272413] [2023-11-29 00:02:16,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:16,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:02:16,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:02:16,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:02:16,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:02:16,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-29 00:02:16,241 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) [2023-11-29 00:02:16,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:02:16,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-29 00:02:16,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:02:16,393 INFO L124 PetriNetUnfolderBase]: 96/222 cut-off events. [2023-11-29 00:02:16,394 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2023-11-29 00:02:16,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 222 events. 96/222 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 933 event pairs, 68 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 424. Up to 163 conditions per place. [2023-11-29 00:02:16,395 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 27 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2023-11-29 00:02:16,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 44 transitions, 213 flow [2023-11-29 00:02:16,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:02:16,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:02:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2023-11-29 00:02:16,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2023-11-29 00:02:16,397 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 111 transitions. [2023-11-29 00:02:16,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 111 transitions. [2023-11-29 00:02:16,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:02:16,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 111 transitions. [2023-11-29 00:02:16,397 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) [2023-11-29 00:02:16,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:16,398 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:16,398 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 151 flow. Second operand 4 states and 111 transitions. [2023-11-29 00:02:16,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 44 transitions, 213 flow [2023-11-29 00:02:16,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 44 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:02:16,400 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 158 flow [2023-11-29 00:02:16,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, 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} [2023-11-29 00:02:16,401 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-11-29 00:02:16,401 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 158 flow [2023-11-29 00:02:16,401 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) [2023-11-29 00:02:16,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:02:16,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:02:16,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-29 00:02:16,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:16,602 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:02:16,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:16,602 INFO L85 PathProgramCache]: Analyzing trace with hash 420749008, now seen corresponding path program 1 times [2023-11-29 00:02:16,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:02:16,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311817636] [2023-11-29 00:02:16,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:16,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:16,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:02:16,603 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:02:16,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-29 00:02:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:16,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:02:16,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:16,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:02:16,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:16,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:16,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:16,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:02:16,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:16,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:16,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:16,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:16,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:16,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:02:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:16,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:16,861 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:02:16,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311817636] [2023-11-29 00:02:16,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311817636] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:16,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:16,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:02:16,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709138479] [2023-11-29 00:02:16,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:16,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:02:16,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:02:16,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:02:16,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:02:17,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-29 00:02:17,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 158 flow. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:17,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:02:17,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-29 00:02:17,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:02:17,428 INFO L124 PetriNetUnfolderBase]: 188/380 cut-off events. [2023-11-29 00:02:17,428 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2023-11-29 00:02:17,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 380 events. 188/380 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1710 event pairs, 83 based on Foata normal form. 0/315 useless extension candidates. Maximal degree in co-relation 739. Up to 204 conditions per place. [2023-11-29 00:02:17,430 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 44 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2023-11-29 00:02:17,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 312 flow [2023-11-29 00:02:17,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:02:17,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:02:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2023-11-29 00:02:17,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2023-11-29 00:02:17,432 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 177 transitions. [2023-11-29 00:02:17,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 177 transitions. [2023-11-29 00:02:17,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:02:17,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 177 transitions. [2023-11-29 00:02:17,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.5) internal successors, (177), 6 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:17,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 48.0) internal successors, (336), 7 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:17,434 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 48.0) internal successors, (336), 7 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:17,434 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 158 flow. Second operand 6 states and 177 transitions. [2023-11-29 00:02:17,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 312 flow [2023-11-29 00:02:17,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 65 transitions, 305 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:02:17,438 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 200 flow [2023-11-29 00:02:17,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2023-11-29 00:02:17,439 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 8 predicate places. [2023-11-29 00:02:17,439 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 200 flow [2023-11-29 00:02:17,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:17,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:02:17,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:02:17,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-29 00:02:17,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:17,642 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:02:17,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:17,642 INFO L85 PathProgramCache]: Analyzing trace with hash 635101206, now seen corresponding path program 1 times [2023-11-29 00:02:17,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:02:17,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145568025] [2023-11-29 00:02:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:17,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:17,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:02:17,643 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:02:17,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-29 00:02:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:17,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:02:17,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:17,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 00:02:17,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:17,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:02:17,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:17,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:02:17,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:17,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:17,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:17,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:17,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:17,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:02:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:17,944 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:17,944 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:02:17,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145568025] [2023-11-29 00:02:17,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145568025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:17,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:17,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:02:17,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367461751] [2023-11-29 00:02:17,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:17,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:02:17,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:02:17,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:02:17,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:02:18,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-29 00:02:18,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:18,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:02:18,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-29 00:02:18,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:02:18,636 INFO L124 PetriNetUnfolderBase]: 298/579 cut-off events. [2023-11-29 00:02:18,636 INFO L125 PetriNetUnfolderBase]: For 221/254 co-relation queries the response was YES. [2023-11-29 00:02:18,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 579 events. 298/579 cut-off events. For 221/254 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2759 event pairs, 126 based on Foata normal form. 33/564 useless extension candidates. Maximal degree in co-relation 1364. Up to 325 conditions per place. [2023-11-29 00:02:18,643 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 50 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2023-11-29 00:02:18,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 72 transitions, 412 flow [2023-11-29 00:02:18,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:02:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:02:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2023-11-29 00:02:18,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6076388888888888 [2023-11-29 00:02:18,646 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 175 transitions. [2023-11-29 00:02:18,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 175 transitions. [2023-11-29 00:02:18,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:02:18,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 175 transitions. [2023-11-29 00:02:18,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:18,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 48.0) internal successors, (336), 7 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:18,648 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 48.0) internal successors, (336), 7 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:18,648 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 200 flow. Second operand 6 states and 175 transitions. [2023-11-29 00:02:18,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 72 transitions, 412 flow [2023-11-29 00:02:18,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 72 transitions, 391 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:02:18,653 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 234 flow [2023-11-29 00:02:18,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2023-11-29 00:02:18,654 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 12 predicate places. [2023-11-29 00:02:18,654 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 234 flow [2023-11-29 00:02:18,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:18,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:02:18,654 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-29 00:02:18,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-11-29 00:02:18,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:18,857 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:02:18,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:18,858 INFO L85 PathProgramCache]: Analyzing trace with hash 202304992, now seen corresponding path program 2 times [2023-11-29 00:02:18,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:02:18,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328907595] [2023-11-29 00:02:18,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:02:18,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:18,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:02:18,859 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:02:18,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-29 00:02:18,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:02:18,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:02:18,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:02:18,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:18,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 00:02:18,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:18,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:02:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:19,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:02:19,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:19,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:19,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:19,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:19,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:19,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:02:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:19,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:02:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:19,992 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:02:19,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328907595] [2023-11-29 00:02:19,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328907595] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:02:19,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:02:19,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 00:02:19,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637447690] [2023-11-29 00:02:19,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:02:19,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:02:19,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:02:19,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:02:19,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:02:21,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-29 00:02:21,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 234 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) [2023-11-29 00:02:21,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:02:21,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-29 00:02:21,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:02:24,476 INFO L124 PetriNetUnfolderBase]: 278/591 cut-off events. [2023-11-29 00:02:24,477 INFO L125 PetriNetUnfolderBase]: For 436/466 co-relation queries the response was YES. [2023-11-29 00:02:24,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1608 conditions, 591 events. 278/591 cut-off events. For 436/466 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3062 event pairs, 181 based on Foata normal form. 20/557 useless extension candidates. Maximal degree in co-relation 1588. Up to 439 conditions per place. [2023-11-29 00:02:24,481 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 27 selfloop transitions, 31 changer transitions 0/70 dead transitions. [2023-11-29 00:02:24,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 70 transitions, 452 flow [2023-11-29 00:02:24,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:02:24,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 00:02:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 542 transitions. [2023-11-29 00:02:24,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132575757575758 [2023-11-29 00:02:24,485 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 542 transitions. [2023-11-29 00:02:24,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 542 transitions. [2023-11-29 00:02:24,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:02:24,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 542 transitions. [2023-11-29 00:02:24,487 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) [2023-11-29 00:02:24,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 48.0) internal successors, (1104), 23 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:24,489 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 48.0) internal successors, (1104), 23 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:24,489 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 234 flow. Second operand 22 states and 542 transitions. [2023-11-29 00:02:24,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 70 transitions, 452 flow [2023-11-29 00:02:24,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 70 transitions, 425 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:02:24,493 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 401 flow [2023-11-29 00:02:24,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=401, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2023-11-29 00:02:24,494 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 36 predicate places. [2023-11-29 00:02:24,494 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 401 flow [2023-11-29 00:02:24,494 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) [2023-11-29 00:02:24,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:02:24,494 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:02:24,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-29 00:02:24,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:24,695 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:02:24,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:24,695 INFO L85 PathProgramCache]: Analyzing trace with hash 573619637, now seen corresponding path program 1 times [2023-11-29 00:02:24,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:02:24,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434947823] [2023-11-29 00:02:24,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:24,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:24,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:02:24,696 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:02:24,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-29 00:02:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:24,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 00:02:24,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:24,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:02:24,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:24,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:24,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:24,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:24,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:24,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:02:24,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:24,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:02:24,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:24,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:24,968 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:24,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:02:24,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434947823] [2023-11-29 00:02:24,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434947823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:24,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:24,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:02:24,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123368806] [2023-11-29 00:02:24,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:24,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:02:24,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:02:24,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:02:24,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:02:25,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2023-11-29 00:02:25,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 401 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:25,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:02:25,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2023-11-29 00:02:25,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:02:25,449 INFO L124 PetriNetUnfolderBase]: 279/598 cut-off events. [2023-11-29 00:02:25,449 INFO L125 PetriNetUnfolderBase]: For 388/432 co-relation queries the response was YES. [2023-11-29 00:02:25,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1673 conditions, 598 events. 279/598 cut-off events. For 388/432 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2965 event pairs, 178 based on Foata normal form. 45/627 useless extension candidates. Maximal degree in co-relation 1647. Up to 415 conditions per place. [2023-11-29 00:02:25,456 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 68 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2023-11-29 00:02:25,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 596 flow [2023-11-29 00:02:25,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:02:25,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:02:25,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2023-11-29 00:02:25,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2023-11-29 00:02:25,458 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 158 transitions. [2023-11-29 00:02:25,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 158 transitions. [2023-11-29 00:02:25,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:02:25,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 158 transitions. [2023-11-29 00:02:25,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:25,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 48.0) internal successors, (288), 6 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:25,460 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 48.0) internal successors, (288), 6 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:25,460 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 401 flow. Second operand 5 states and 158 transitions. [2023-11-29 00:02:25,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 596 flow [2023-11-29 00:02:25,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 86 transitions, 516 flow, removed 27 selfloop flow, removed 9 redundant places. [2023-11-29 00:02:25,465 INFO L231 Difference]: Finished difference. Result has 82 places, 72 transitions, 358 flow [2023-11-29 00:02:25,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=358, PETRI_PLACES=82, PETRI_TRANSITIONS=72} [2023-11-29 00:02:25,466 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 33 predicate places. [2023-11-29 00:02:25,466 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 72 transitions, 358 flow [2023-11-29 00:02:25,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:25,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:02:25,466 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:02:25,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-11-29 00:02:25,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:25,668 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:02:25,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:25,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1512897921, now seen corresponding path program 1 times [2023-11-29 00:02:25,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:02:25,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132550459] [2023-11-29 00:02:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:25,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:25,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:02:25,670 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:02:25,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-29 00:02:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:25,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 00:02:25,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:25,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 00:02:25,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:25,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:25,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:25,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:25,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:25,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:02:25,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:25,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:25,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:25,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:02:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:02:26,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:02:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:02:26,683 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:02:26,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132550459] [2023-11-29 00:02:26,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132550459] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:02:26,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:02:26,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 00:02:26,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986270467] [2023-11-29 00:02:26,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:02:26,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:02:26,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:02:26,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:02:26,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:02:28,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-29 00:02:28,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 72 transitions, 358 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) [2023-11-29 00:02:28,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:02:28,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-29 00:02:28,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:02:30,172 INFO L124 PetriNetUnfolderBase]: 638/1239 cut-off events. [2023-11-29 00:02:30,172 INFO L125 PetriNetUnfolderBase]: For 1216/1306 co-relation queries the response was YES. [2023-11-29 00:02:30,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3749 conditions, 1239 events. 638/1239 cut-off events. For 1216/1306 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 6023 event pairs, 94 based on Foata normal form. 104/1333 useless extension candidates. Maximal degree in co-relation 3721. Up to 296 conditions per place. [2023-11-29 00:02:30,182 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 140 selfloop transitions, 30 changer transitions 0/181 dead transitions. [2023-11-29 00:02:30,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 181 transitions, 1165 flow [2023-11-29 00:02:30,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:02:30,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 00:02:30,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 402 transitions. [2023-11-29 00:02:30,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6442307692307693 [2023-11-29 00:02:30,185 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 402 transitions. [2023-11-29 00:02:30,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 402 transitions. [2023-11-29 00:02:30,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:02:30,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 402 transitions. [2023-11-29 00:02:30,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 30.923076923076923) internal successors, (402), 13 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:30,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 48.0) internal successors, (672), 14 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:30,189 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 48.0) internal successors, (672), 14 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:30,189 INFO L175 Difference]: Start difference. First operand has 82 places, 72 transitions, 358 flow. Second operand 13 states and 402 transitions. [2023-11-29 00:02:30,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 181 transitions, 1165 flow [2023-11-29 00:02:30,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 181 transitions, 1160 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:02:30,197 INFO L231 Difference]: Finished difference. Result has 96 places, 83 transitions, 511 flow [2023-11-29 00:02:30,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=511, PETRI_PLACES=96, PETRI_TRANSITIONS=83} [2023-11-29 00:02:30,197 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 47 predicate places. [2023-11-29 00:02:30,198 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 83 transitions, 511 flow [2023-11-29 00:02:30,198 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) [2023-11-29 00:02:30,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:02:30,198 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:02:30,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-11-29 00:02:30,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:30,399 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:02:30,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:30,399 INFO L85 PathProgramCache]: Analyzing trace with hash 319900335, now seen corresponding path program 1 times [2023-11-29 00:02:30,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:02:30,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492867899] [2023-11-29 00:02:30,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:30,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:30,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:02:30,401 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:02:30,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-29 00:02:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:30,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 00:02:30,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:30,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 00:02:30,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:30,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:02:30,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:30,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:02:30,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:30,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:30,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:30,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:02:30,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:30,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:02:30,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:02:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:02:31,594 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:02:31,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492867899] [2023-11-29 00:02:31,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [492867899] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:02:31,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:02:31,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 00:02:31,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746516618] [2023-11-29 00:02:31,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:02:31,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:02:31,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:02:31,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:02:31,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:02:33,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-29 00:02:33,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 83 transitions, 511 flow. Second operand has 14 states, 14 states have (on average 23.857142857142858) internal successors, (334), 14 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:33,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:02:33,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-29 00:02:33,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:02:35,523 INFO L124 PetriNetUnfolderBase]: 1144/2086 cut-off events. [2023-11-29 00:02:35,524 INFO L125 PetriNetUnfolderBase]: For 5390/5623 co-relation queries the response was YES. [2023-11-29 00:02:35,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7607 conditions, 2086 events. 1144/2086 cut-off events. For 5390/5623 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 10757 event pairs, 238 based on Foata normal form. 195/2229 useless extension candidates. Maximal degree in co-relation 7575. Up to 551 conditions per place. [2023-11-29 00:02:35,543 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 195 selfloop transitions, 29 changer transitions 2/241 dead transitions. [2023-11-29 00:02:35,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 241 transitions, 2135 flow [2023-11-29 00:02:35,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:02:35,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 00:02:35,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 392 transitions. [2023-11-29 00:02:35,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2023-11-29 00:02:35,546 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 392 transitions. [2023-11-29 00:02:35,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 392 transitions. [2023-11-29 00:02:35,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:02:35,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 392 transitions. [2023-11-29 00:02:35,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 30.153846153846153) internal successors, (392), 13 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:35,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 48.0) internal successors, (672), 14 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:35,550 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 48.0) internal successors, (672), 14 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:35,551 INFO L175 Difference]: Start difference. First operand has 96 places, 83 transitions, 511 flow. Second operand 13 states and 392 transitions. [2023-11-29 00:02:35,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 241 transitions, 2135 flow [2023-11-29 00:02:35,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 241 transitions, 1952 flow, removed 60 selfloop flow, removed 4 redundant places. [2023-11-29 00:02:35,565 INFO L231 Difference]: Finished difference. Result has 108 places, 94 transitions, 634 flow [2023-11-29 00:02:35,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=634, PETRI_PLACES=108, PETRI_TRANSITIONS=94} [2023-11-29 00:02:35,566 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 59 predicate places. [2023-11-29 00:02:35,566 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 94 transitions, 634 flow [2023-11-29 00:02:35,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.857142857142858) internal successors, (334), 14 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:35,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:02:35,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:02:35,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-11-29 00:02:35,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:35,767 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:02:35,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:35,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1462742821, now seen corresponding path program 1 times [2023-11-29 00:02:35,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:02:35,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838346413] [2023-11-29 00:02:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:35,768 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:35,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:02:35,769 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:02:35,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-29 00:02:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:35,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:02:35,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:35,879 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:35,879 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:02:35,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838346413] [2023-11-29 00:02:35,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838346413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:35,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:35,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:02:35,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622623734] [2023-11-29 00:02:35,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:35,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:02:35,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:02:35,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:02:35,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:02:35,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2023-11-29 00:02:35,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 94 transitions, 634 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:35,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:02:35,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2023-11-29 00:02:35,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:02:36,310 INFO L124 PetriNetUnfolderBase]: 1389/2561 cut-off events. [2023-11-29 00:02:36,310 INFO L125 PetriNetUnfolderBase]: For 7337/7516 co-relation queries the response was YES. [2023-11-29 00:02:36,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9759 conditions, 2561 events. 1389/2561 cut-off events. For 7337/7516 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 13202 event pairs, 475 based on Foata normal form. 86/2601 useless extension candidates. Maximal degree in co-relation 9723. Up to 2030 conditions per place. [2023-11-29 00:02:36,334 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 83 selfloop transitions, 3 changer transitions 4/109 dead transitions. [2023-11-29 00:02:36,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 109 transitions, 899 flow [2023-11-29 00:02:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:02:36,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:02:36,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2023-11-29 00:02:36,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2023-11-29 00:02:36,335 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 100 transitions. [2023-11-29 00:02:36,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 100 transitions. [2023-11-29 00:02:36,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:02:36,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 100 transitions. [2023-11-29 00:02:36,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 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) [2023-11-29 00:02:36,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:36,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:36,337 INFO L175 Difference]: Start difference. First operand has 108 places, 94 transitions, 634 flow. Second operand 3 states and 100 transitions. [2023-11-29 00:02:36,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 109 transitions, 899 flow [2023-11-29 00:02:36,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 109 transitions, 861 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-29 00:02:36,348 INFO L231 Difference]: Finished difference. Result has 107 places, 93 transitions, 589 flow [2023-11-29 00:02:36,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=589, PETRI_PLACES=107, PETRI_TRANSITIONS=93} [2023-11-29 00:02:36,349 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 58 predicate places. [2023-11-29 00:02:36,349 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 93 transitions, 589 flow [2023-11-29 00:02:36,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:36,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:02:36,349 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2023-11-29 00:02:36,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-11-29 00:02:36,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:36,550 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:02:36,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:36,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1156841560, now seen corresponding path program 3 times [2023-11-29 00:02:36,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:02:36,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402033539] [2023-11-29 00:02:36,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:02:36,551 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:02:36,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:02:36,552 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:02:36,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-29 00:02:36,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 00:02:36,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:02:36,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:02:36,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:36,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 00:02:36,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:36,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:02:36,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:36,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:36,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:36,851 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 [2023-11-29 00:02:36,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:36,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:02:36,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:02:36,865 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 [2023-11-29 00:02:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:37,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:02:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:40,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:02:40,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402033539] [2023-11-29 00:02:40,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402033539] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:02:40,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:02:40,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-11-29 00:02:40,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25992444] [2023-11-29 00:02:40,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:02:40,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 00:02:40,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:02:40,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 00:02:40,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:02:46,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-29 00:02:46,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 93 transitions, 589 flow. Second operand has 26 states, 26 states have (on average 23.76923076923077) internal successors, (618), 26 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:46,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:02:46,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-29 00:02:46,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:03:13,296 INFO L124 PetriNetUnfolderBase]: 1093/2219 cut-off events. [2023-11-29 00:03:13,296 INFO L125 PetriNetUnfolderBase]: For 7688/7905 co-relation queries the response was YES. [2023-11-29 00:03:13,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8404 conditions, 2219 events. 1093/2219 cut-off events. For 7688/7905 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 13292 event pairs, 743 based on Foata normal form. 80/2090 useless extension candidates. Maximal degree in co-relation 8367. Up to 1650 conditions per place. [2023-11-29 00:03:13,319 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 41 selfloop transitions, 66 changer transitions 0/129 dead transitions. [2023-11-29 00:03:13,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 129 transitions, 1031 flow [2023-11-29 00:03:13,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 00:03:13,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-29 00:03:13,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1111 transitions. [2023-11-29 00:03:13,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031702898550725 [2023-11-29 00:03:13,325 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 1111 transitions. [2023-11-29 00:03:13,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 1111 transitions. [2023-11-29 00:03:13,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:03:13,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 1111 transitions. [2023-11-29 00:03:13,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 24.152173913043477) internal successors, (1111), 46 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:13,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 48.0) internal successors, (2256), 47 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:13,334 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 48.0) internal successors, (2256), 47 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:13,334 INFO L175 Difference]: Start difference. First operand has 107 places, 93 transitions, 589 flow. Second operand 46 states and 1111 transitions. [2023-11-29 00:03:13,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 129 transitions, 1031 flow [2023-11-29 00:03:13,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 129 transitions, 1016 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-29 00:03:13,346 INFO L231 Difference]: Finished difference. Result has 160 places, 129 transitions, 988 flow [2023-11-29 00:03:13,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=988, PETRI_PLACES=160, PETRI_TRANSITIONS=129} [2023-11-29 00:03:13,346 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 111 predicate places. [2023-11-29 00:03:13,346 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 129 transitions, 988 flow [2023-11-29 00:03:13,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 23.76923076923077) internal successors, (618), 26 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:13,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:03:13,347 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, 1, 1] [2023-11-29 00:03:13,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-11-29 00:03:13,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:03:13,547 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:03:13,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:13,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1408634302, now seen corresponding path program 1 times [2023-11-29 00:03:13,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:03:13,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827683655] [2023-11-29 00:03:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:13,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:03:13,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:03:13,549 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:03:13,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-29 00:03:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:13,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:03:13,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:13,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:13,916 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:03:13,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827683655] [2023-11-29 00:03:13,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827683655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:13,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:03:13,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-29 00:03:13,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613493928] [2023-11-29 00:03:13,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:13,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:03:13,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:03:13,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:03:13,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:03:13,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-29 00:03:13,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 129 transitions, 988 flow. Second operand has 12 states, 12 states have (on average 24.5) internal successors, (294), 12 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:13,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:03:13,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-29 00:03:13,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:03:14,952 INFO L124 PetriNetUnfolderBase]: 2342/4371 cut-off events. [2023-11-29 00:03:14,952 INFO L125 PetriNetUnfolderBase]: For 10542/10985 co-relation queries the response was YES. [2023-11-29 00:03:14,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16189 conditions, 4371 events. 2342/4371 cut-off events. For 10542/10985 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 27682 event pairs, 696 based on Foata normal form. 223/4420 useless extension candidates. Maximal degree in co-relation 16140. Up to 1077 conditions per place. [2023-11-29 00:03:14,991 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 177 selfloop transitions, 23 changer transitions 0/217 dead transitions. [2023-11-29 00:03:14,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 217 transitions, 1948 flow [2023-11-29 00:03:14,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:03:14,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 00:03:14,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 292 transitions. [2023-11-29 00:03:14,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2023-11-29 00:03:14,993 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 292 transitions. [2023-11-29 00:03:14,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 292 transitions. [2023-11-29 00:03:14,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:03:14,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 292 transitions. [2023-11-29 00:03:14,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 29.2) internal successors, (292), 10 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:14,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 48.0) internal successors, (528), 11 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:14,995 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 48.0) internal successors, (528), 11 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:14,995 INFO L175 Difference]: Start difference. First operand has 160 places, 129 transitions, 988 flow. Second operand 10 states and 292 transitions. [2023-11-29 00:03:14,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 217 transitions, 1948 flow [2023-11-29 00:03:15,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 217 transitions, 1774 flow, removed 57 selfloop flow, removed 21 redundant places. [2023-11-29 00:03:15,022 INFO L231 Difference]: Finished difference. Result has 148 places, 137 transitions, 915 flow [2023-11-29 00:03:15,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=915, PETRI_PLACES=148, PETRI_TRANSITIONS=137} [2023-11-29 00:03:15,023 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 99 predicate places. [2023-11-29 00:03:15,023 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 137 transitions, 915 flow [2023-11-29 00:03:15,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.5) internal successors, (294), 12 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:15,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:03:15,024 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, 1, 1] [2023-11-29 00:03:15,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-11-29 00:03:15,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:03:15,227 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:03:15,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:15,228 INFO L85 PathProgramCache]: Analyzing trace with hash -183776420, now seen corresponding path program 1 times [2023-11-29 00:03:15,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:03:15,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052291343] [2023-11-29 00:03:15,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:15,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:03:15,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:03:15,230 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:03:15,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-29 00:03:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:15,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:03:15,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:03:15,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:03:15,571 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:03:15,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052291343] [2023-11-29 00:03:15,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052291343] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:15,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:03:15,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-29 00:03:15,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902678221] [2023-11-29 00:03:15,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:15,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:03:15,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:03:15,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:03:15,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:03:15,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-29 00:03:15,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 137 transitions, 915 flow. Second operand has 12 states, 12 states have (on average 24.166666666666668) internal successors, (290), 12 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:15,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:03:15,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-29 00:03:15,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:03:16,641 INFO L124 PetriNetUnfolderBase]: 2283/4280 cut-off events. [2023-11-29 00:03:16,641 INFO L125 PetriNetUnfolderBase]: For 11828/12361 co-relation queries the response was YES. [2023-11-29 00:03:16,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16275 conditions, 4280 events. 2283/4280 cut-off events. For 11828/12361 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 27554 event pairs, 648 based on Foata normal form. 232/4320 useless extension candidates. Maximal degree in co-relation 16226. Up to 1046 conditions per place. [2023-11-29 00:03:16,681 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 175 selfloop transitions, 23 changer transitions 0/219 dead transitions. [2023-11-29 00:03:16,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 219 transitions, 1854 flow [2023-11-29 00:03:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:03:16,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 00:03:16,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 295 transitions. [2023-11-29 00:03:16,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2023-11-29 00:03:16,684 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 295 transitions. [2023-11-29 00:03:16,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 295 transitions. [2023-11-29 00:03:16,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:03:16,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 295 transitions. [2023-11-29 00:03:16,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 29.5) internal successors, (295), 10 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:16,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 48.0) internal successors, (528), 11 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:16,687 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 48.0) internal successors, (528), 11 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:16,687 INFO L175 Difference]: Start difference. First operand has 148 places, 137 transitions, 915 flow. Second operand 10 states and 295 transitions. [2023-11-29 00:03:16,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 219 transitions, 1854 flow [2023-11-29 00:03:16,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 219 transitions, 1846 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 00:03:16,717 INFO L231 Difference]: Finished difference. Result has 153 places, 145 transitions, 1002 flow [2023-11-29 00:03:16,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1002, PETRI_PLACES=153, PETRI_TRANSITIONS=145} [2023-11-29 00:03:16,718 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 104 predicate places. [2023-11-29 00:03:16,718 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 145 transitions, 1002 flow [2023-11-29 00:03:16,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.166666666666668) internal successors, (290), 12 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:16,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:03:16,719 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:16,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-11-29 00:03:16,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:03:16,920 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:03:16,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:16,920 INFO L85 PathProgramCache]: Analyzing trace with hash -325932752, now seen corresponding path program 2 times [2023-11-29 00:03:16,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:03:16,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166597632] [2023-11-29 00:03:16,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:03:16,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:03:16,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:03:16,921 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:03:16,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-29 00:03:17,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:03:17,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:03:17,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:03:17,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:17,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:03:17,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:03:17,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:03:17,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:03:17,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:03:17,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:03:17,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:03:17,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:03:17,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:03:17,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:03:17,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:03:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:17,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:19,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:03:19,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166597632] [2023-11-29 00:03:19,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166597632] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:19,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:03:19,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2023-11-29 00:03:19,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383899328] [2023-11-29 00:03:19,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:19,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:03:19,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:03:19,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:03:19,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:03:23,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2023-11-29 00:03:23,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 145 transitions, 1002 flow. Second operand has 18 states, 18 states have (on average 24.666666666666668) internal successors, (444), 18 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:23,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:03:23,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2023-11-29 00:03:23,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:03:29,699 INFO L124 PetriNetUnfolderBase]: 2514/5110 cut-off events. [2023-11-29 00:03:29,699 INFO L125 PetriNetUnfolderBase]: For 17120/17614 co-relation queries the response was YES. [2023-11-29 00:03:29,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19893 conditions, 5110 events. 2514/5110 cut-off events. For 17120/17614 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 35725 event pairs, 790 based on Foata normal form. 227/5045 useless extension candidates. Maximal degree in co-relation 19844. Up to 1240 conditions per place. [2023-11-29 00:03:29,740 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 288 selfloop transitions, 83 changer transitions 0/399 dead transitions. [2023-11-29 00:03:29,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 399 transitions, 3442 flow [2023-11-29 00:03:29,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 00:03:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 00:03:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 667 transitions. [2023-11-29 00:03:29,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6617063492063492 [2023-11-29 00:03:29,744 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 667 transitions. [2023-11-29 00:03:29,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 667 transitions. [2023-11-29 00:03:29,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:03:29,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 667 transitions. [2023-11-29 00:03:29,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 31.761904761904763) internal successors, (667), 21 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:29,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 48.0) internal successors, (1056), 22 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:29,747 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 48.0) internal successors, (1056), 22 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:29,747 INFO L175 Difference]: Start difference. First operand has 153 places, 145 transitions, 1002 flow. Second operand 21 states and 667 transitions. [2023-11-29 00:03:29,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 399 transitions, 3442 flow [2023-11-29 00:03:29,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 399 transitions, 3434 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 00:03:29,772 INFO L231 Difference]: Finished difference. Result has 174 places, 169 transitions, 1411 flow [2023-11-29 00:03:29,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=946, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1411, PETRI_PLACES=174, PETRI_TRANSITIONS=169} [2023-11-29 00:03:29,773 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 125 predicate places. [2023-11-29 00:03:29,773 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 169 transitions, 1411 flow [2023-11-29 00:03:29,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 24.666666666666668) internal successors, (444), 18 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:29,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:03:29,773 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:29,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-11-29 00:03:29,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:03:29,974 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:03:29,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:29,974 INFO L85 PathProgramCache]: Analyzing trace with hash -781260962, now seen corresponding path program 2 times [2023-11-29 00:03:29,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:03:29,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190247965] [2023-11-29 00:03:29,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:03:29,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:03:29,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:03:29,976 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:03:29,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-29 00:03:30,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:03:30,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:03:30,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:03:30,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:30,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:03:30,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:03:30,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:03:30,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:03:30,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:03:30,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:03:30,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:03:30,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:03:30,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:03:30,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:03:30,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:03:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:30,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:32,182 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:03:32,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190247965] [2023-11-29 00:03:32,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190247965] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:32,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:03:32,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2023-11-29 00:03:32,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692754769] [2023-11-29 00:03:32,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:32,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:03:32,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:03:32,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:03:32,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:03:37,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2023-11-29 00:03:37,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 169 transitions, 1411 flow. Second operand has 18 states, 18 states have (on average 24.88888888888889) internal successors, (448), 18 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:37,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:03:37,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2023-11-29 00:03:37,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:03:43,611 INFO L124 PetriNetUnfolderBase]: 2374/4876 cut-off events. [2023-11-29 00:03:43,611 INFO L125 PetriNetUnfolderBase]: For 25606/26171 co-relation queries the response was YES. [2023-11-29 00:03:43,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21363 conditions, 4876 events. 2374/4876 cut-off events. For 25606/26171 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 33609 event pairs, 873 based on Foata normal form. 218/4828 useless extension candidates. Maximal degree in co-relation 21309. Up to 1154 conditions per place. [2023-11-29 00:03:43,654 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 311 selfloop transitions, 82 changer transitions 0/418 dead transitions. [2023-11-29 00:03:43,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 418 transitions, 4509 flow [2023-11-29 00:03:43,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 00:03:43,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 00:03:43,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 650 transitions. [2023-11-29 00:03:43,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6448412698412699 [2023-11-29 00:03:43,657 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 650 transitions. [2023-11-29 00:03:43,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 650 transitions. [2023-11-29 00:03:43,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:03:43,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 650 transitions. [2023-11-29 00:03:43,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 30.952380952380953) internal successors, (650), 21 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) [2023-11-29 00:03:43,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 48.0) internal successors, (1056), 22 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:43,661 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 48.0) internal successors, (1056), 22 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:43,661 INFO L175 Difference]: Start difference. First operand has 174 places, 169 transitions, 1411 flow. Second operand 21 states and 650 transitions. [2023-11-29 00:03:43,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 418 transitions, 4509 flow [2023-11-29 00:03:43,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 418 transitions, 4285 flow, removed 67 selfloop flow, removed 5 redundant places. [2023-11-29 00:03:43,704 INFO L231 Difference]: Finished difference. Result has 194 places, 187 transitions, 1731 flow [2023-11-29 00:03:43,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1731, PETRI_PLACES=194, PETRI_TRANSITIONS=187} [2023-11-29 00:03:43,705 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 145 predicate places. [2023-11-29 00:03:43,705 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 187 transitions, 1731 flow [2023-11-29 00:03:43,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 24.88888888888889) internal successors, (448), 18 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:43,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:03:43,705 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, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:43,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-11-29 00:03:43,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:03:43,916 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:03:43,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:43,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1105470189, now seen corresponding path program 1 times [2023-11-29 00:03:43,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:03:43,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671172054] [2023-11-29 00:03:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:43,917 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:03:43,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:03:43,918 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:03:43,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-29 00:03:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:44,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:03:44,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:44,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:03:44,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 18 [2023-11-29 00:03:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:03:44,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:44,499 INFO L349 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-11-29 00:03:44,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 74 treesize of output 58 [2023-11-29 00:03:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:03:44,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:03:44,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671172054] [2023-11-29 00:03:44,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671172054] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:44,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:03:44,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-11-29 00:03:44,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346795121] [2023-11-29 00:03:44,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:44,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 00:03:44,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:03:44,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 00:03:44,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:03:44,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2023-11-29 00:03:44,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 187 transitions, 1731 flow. Second operand has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:44,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:03:44,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2023-11-29 00:03:44,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:03:47,640 INFO L124 PetriNetUnfolderBase]: 5187/9453 cut-off events. [2023-11-29 00:03:47,640 INFO L125 PetriNetUnfolderBase]: For 48039/48884 co-relation queries the response was YES. [2023-11-29 00:03:47,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43564 conditions, 9453 events. 5187/9453 cut-off events. For 48039/48884 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 64745 event pairs, 1256 based on Foata normal form. 365/9648 useless extension candidates. Maximal degree in co-relation 43504. Up to 5106 conditions per place. [2023-11-29 00:03:47,726 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 376 selfloop transitions, 79 changer transitions 17/493 dead transitions. [2023-11-29 00:03:47,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 493 transitions, 5410 flow [2023-11-29 00:03:47,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 00:03:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 00:03:47,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 474 transitions. [2023-11-29 00:03:47,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6171875 [2023-11-29 00:03:47,729 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 474 transitions. [2023-11-29 00:03:47,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 474 transitions. [2023-11-29 00:03:47,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:03:47,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 474 transitions. [2023-11-29 00:03:47,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 29.625) internal successors, (474), 16 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:47,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 48.0) internal successors, (816), 17 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:47,731 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 48.0) internal successors, (816), 17 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:47,732 INFO L175 Difference]: Start difference. First operand has 194 places, 187 transitions, 1731 flow. Second operand 16 states and 474 transitions. [2023-11-29 00:03:47,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 493 transitions, 5410 flow [2023-11-29 00:03:47,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 493 transitions, 5084 flow, removed 104 selfloop flow, removed 6 redundant places. [2023-11-29 00:03:47,862 INFO L231 Difference]: Finished difference. Result has 212 places, 264 transitions, 2558 flow [2023-11-29 00:03:47,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2558, PETRI_PLACES=212, PETRI_TRANSITIONS=264} [2023-11-29 00:03:47,863 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 163 predicate places. [2023-11-29 00:03:47,863 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 264 transitions, 2558 flow [2023-11-29 00:03:47,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:47,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:03:47,863 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, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:47,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-11-29 00:03:48,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:03:48,064 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 00:03:48,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:48,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2110211959, now seen corresponding path program 2 times [2023-11-29 00:03:48,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:03:48,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572973625] [2023-11-29 00:03:48,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:03:48,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:03:48,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:03:48,066 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:03:48,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-29 00:03:48,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:03:48,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-11-29 00:03:48,254 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 00:03:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:03:48,460 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-11-29 00:03:48,460 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 00:03:48,460 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (21 of 22 remaining) [2023-11-29 00:03:48,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 22 remaining) [2023-11-29 00:03:48,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 22 remaining) [2023-11-29 00:03:48,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 22 remaining) [2023-11-29 00:03:48,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 22 remaining) [2023-11-29 00:03:48,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 22 remaining) [2023-11-29 00:03:48,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 22 remaining) [2023-11-29 00:03:48,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 22 remaining) [2023-11-29 00:03:48,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 22 remaining) [2023-11-29 00:03:48,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 22 remaining) [2023-11-29 00:03:48,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 22 remaining) [2023-11-29 00:03:48,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 22 remaining) [2023-11-29 00:03:48,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 22 remaining) [2023-11-29 00:03:48,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 22 remaining) [2023-11-29 00:03:48,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 22 remaining) [2023-11-29 00:03:48,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK (6 of 22 remaining) [2023-11-29 00:03:48,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 22 remaining) [2023-11-29 00:03:48,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 22 remaining) [2023-11-29 00:03:48,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 22 remaining) [2023-11-29 00:03:48,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 22 remaining) [2023-11-29 00:03:48,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 22 remaining) [2023-11-29 00:03:48,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 22 remaining) [2023-11-29 00:03:48,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2023-11-29 00:03:48,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f4abfe8-0753-4acd-b59b-f254f22738a6/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:03:48,665 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:48,670 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-29 00:03:48,670 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 00:03:48,702 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-29 00:03:48,703 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated [2023-11-29 00:03:48,704 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated [2023-11-29 00:03:48,705 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-29 00:03:48,706 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated [2023-11-29 00:03:48,706 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-29 00:03:48,707 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated [2023-11-29 00:03:48,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 12:03:48 BasicIcfg [2023-11-29 00:03:48,716 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 00:03:48,717 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 00:03:48,717 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 00:03:48,717 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 00:03:48,717 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:02:09" (3/4) ... [2023-11-29 00:03:48,719 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-29 00:03:48,720 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 00:03:48,720 INFO L158 Benchmark]: Toolchain (without parser) took 100687.85ms. Allocated memory was 100.7MB in the beginning and 627.0MB in the end (delta: 526.4MB). Free memory was 75.1MB in the beginning and 326.4MB in the end (delta: -251.3MB). Peak memory consumption was 274.6MB. Max. memory is 16.1GB. [2023-11-29 00:03:48,721 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 58.7MB. Free memory is still 35.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 00:03:48,721 INFO L158 Benchmark]: CACSL2BoogieTranslator took 292.89ms. Allocated memory is still 100.7MB. Free memory was 74.8MB in the beginning and 61.0MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-29 00:03:48,721 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.52ms. Allocated memory is still 100.7MB. Free memory was 61.0MB in the beginning and 58.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 00:03:48,721 INFO L158 Benchmark]: Boogie Preprocessor took 65.23ms. Allocated memory is still 100.7MB. Free memory was 58.9MB in the beginning and 55.8MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 00:03:48,722 INFO L158 Benchmark]: RCFGBuilder took 923.53ms. Allocated memory is still 100.7MB. Free memory was 55.8MB in the beginning and 49.3MB in the end (delta: 6.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-29 00:03:48,722 INFO L158 Benchmark]: TraceAbstraction took 99346.33ms. Allocated memory was 100.7MB in the beginning and 627.0MB in the end (delta: 526.4MB). Free memory was 48.4MB in the beginning and 326.4MB in the end (delta: -278.0MB). Peak memory consumption was 248.0MB. Max. memory is 16.1GB. [2023-11-29 00:03:48,722 INFO L158 Benchmark]: Witness Printer took 3.25ms. Allocated memory is still 627.0MB. Free memory is still 326.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 00:03:48,724 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 58.7MB. Free memory is still 35.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 292.89ms. Allocated memory is still 100.7MB. Free memory was 74.8MB in the beginning and 61.0MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.52ms. Allocated memory is still 100.7MB. Free memory was 61.0MB in the beginning and 58.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 65.23ms. Allocated memory is still 100.7MB. Free memory was 58.9MB in the beginning and 55.8MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 923.53ms. Allocated memory is still 100.7MB. Free memory was 55.8MB in the beginning and 49.3MB in the end (delta: 6.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 99346.33ms. Allocated memory was 100.7MB in the beginning and 627.0MB in the end (delta: 526.4MB). Free memory was 48.4MB in the beginning and 326.4MB in the end (delta: -278.0MB). Peak memory consumption was 248.0MB. Max. memory is 16.1GB. * Witness Printer took 3.25ms. Allocated memory is still 627.0MB. Free memory is still 326.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 21. Possible FailurePath: [L41] 0 int* A; [L42] 0 int counter, N; [L75] 0 pthread_t t1, t2; [L77] 0 N = __VERIFIER_nondet_int() [L78] CALL, EXPR 0 create_fresh_int_array(N) [L93] CALL 0 assume_abort_if_not(size >= 0) [L38] COND FALSE 0 !(!cond) [L93] RET 0 assume_abort_if_not(size >= 0) [L94] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) [L94] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L96] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L97] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={3:0}, counter=0, i=0, size=1] [L97] COND TRUE 0 i < size [L98] 0 arr[i] = __VERIFIER_nondet_int() [L97] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={3:0}, counter=0, i=1, size=1] [L97] COND FALSE 0 !(i < size) [L100] 0 return arr; [L78] RET, EXPR 0 create_fresh_int_array(N) [L78] 0 A = create_fresh_int_array(N) [L81] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={3:0}, N=1, counter=0, t1={17:0}, t2={18:0}] [L82] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={3:0}, N=1, counter=0, t1={17:0}, t2={18:0}] [L62] 2 int i=0; VAL [A={3:0}, N=1, _argptr={0:0}, _argptr={0:0}, counter=0, i=0] [L62] COND TRUE 2 i= b - 2147483648) [L38] COND FALSE 2 !(!cond) [L104] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 2 !(!cond) [L105] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 2 return a - b; [L64] RET, EXPR 2 minus(counter, A[i]) [L64] 2 int tmp = minus(counter, A[i]); [L49] 1 int i=0; VAL [A={3:0}, N=1, _argptr={0:0}, _argptr={0:0}, counter=0, i=0] [L49] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 1 !(!cond) [L110] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 1 !(!cond) [L111] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 1 return a + b; [L51] RET, EXPR 1 plus(counter, A[i]) [L51] 1 int tmp = plus(counter, A[i]); [L54] 1 counter = tmp VAL [A={3:0}, N=1, _argptr={0:0}, _argptr={0:0}, counter=589824, i=0, tmp=589824] [L49] 1 i++ VAL [A={3:0}, N=1, _argptr={0:0}, _argptr={0:0}, counter=589824, i=1, tmp=589824] [L49] COND FALSE 1 !(i