./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_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/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_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI --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 [2023-11-24 22:01:33,421 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:01:33,538 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 22:01:33,544 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:01:33,545 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:01:33,577 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:01:33,578 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:01:33,578 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:01:33,579 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:01:33,580 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:01:33,581 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:01:33,582 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:01:33,583 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:01:33,584 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:01:33,585 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:01:33,586 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:01:33,587 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:01:33,587 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:01:33,588 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:01:33,589 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:01:33,590 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 22:01:33,591 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 22:01:33,591 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 22:01:33,592 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:01:33,593 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 22:01:33,593 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 22:01:33,594 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:01:33,595 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:01:33,595 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:01:33,596 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:01:33,597 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:01:33,597 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:01:33,598 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:01:33,598 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:01:33,599 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:01:33,600 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:01:33,600 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:01:33,601 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:01:33,601 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:01:33,602 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:01:33,603 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:01:33,603 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_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebdf94362dc31684fc6d7640230484df679da941d20fe978f9edfe1d75c48a51 [2023-11-24 22:01:33,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:01:34,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:01:34,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:01:34,014 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:01:34,014 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:01:34,016 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2023-11-24 22:01:37,337 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:01:37,623 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:01:37,626 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2023-11-24 22:01:37,642 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/data/6fc194924/c715a1302dd04dc2b63c2cc1cc9b5c7e/FLAG6189dbd5a [2023-11-24 22:01:37,665 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/data/6fc194924/c715a1302dd04dc2b63c2cc1cc9b5c7e [2023-11-24 22:01:37,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:01:37,674 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:01:37,676 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:01:37,676 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:01:37,683 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:01:37,686 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:01:37" (1/1) ... [2023-11-24 22:01:37,687 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@84d69f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:37, skipping insertion in model container [2023-11-24 22:01:37,687 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:01:37" (1/1) ... [2023-11-24 22:01:37,723 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:01:38,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:01:38,029 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) [2023-11-24 22:01:38,029 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4e09bd8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:38, skipping insertion in model container [2023-11-24 22:01:38,029 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:01:38,030 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-24 22:01:38,031 INFO L158 Benchmark]: Toolchain (without parser) took 357.09ms. Allocated memory is still 159.4MB. Free memory was 111.3MB in the beginning and 101.4MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-24 22:01:38,032 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 159.4MB. Free memory is still 106.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 22:01:38,033 INFO L158 Benchmark]: CACSL2BoogieTranslator took 353.76ms. Allocated memory is still 159.4MB. Free memory was 111.3MB in the beginning and 101.4MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-24 22:01:38,035 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 159.4MB. Free memory is still 106.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 353.76ms. Allocated memory is still 159.4MB. Free memory was 111.3MB in the beginning and 101.4MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. 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_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/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_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI --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 [2023-11-24 22:01:40,909 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:01:40,994 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-24 22:01:41,023 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:01:41,024 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:01:41,086 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:01:41,087 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:01:41,088 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:01:41,089 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:01:41,096 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:01:41,096 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:01:41,097 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:01:41,098 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:01:41,100 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:01:41,101 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:01:41,102 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:01:41,102 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:01:41,103 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:01:41,103 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:01:41,105 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:01:41,105 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 22:01:41,106 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 22:01:41,106 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 22:01:41,107 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:01:41,107 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 22:01:41,108 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 22:01:41,108 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 22:01:41,109 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 22:01:41,110 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:01:41,110 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:01:41,112 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:01:41,113 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:01:41,113 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:01:41,113 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:01:41,114 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:01:41,114 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:01:41,115 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:01:41,116 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-24 22:01:41,116 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 22:01:41,116 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:01:41,117 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:01:41,117 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:01:41,117 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:01:41,118 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-24 22:01:41,118 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_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebdf94362dc31684fc6d7640230484df679da941d20fe978f9edfe1d75c48a51 [2023-11-24 22:01:41,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:01:41,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:01:41,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:01:41,647 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:01:41,648 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:01:41,649 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2023-11-24 22:01:45,177 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:01:45,466 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:01:45,467 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2023-11-24 22:01:45,477 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/data/b9f689a89/c7641c80c67d413ba072aa2efe6a2009/FLAGf1f4a79ce [2023-11-24 22:01:45,500 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/data/b9f689a89/c7641c80c67d413ba072aa2efe6a2009 [2023-11-24 22:01:45,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:01:45,514 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:01:45,520 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:01:45,521 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:01:45,527 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:01:45,528 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:01:45" (1/1) ... [2023-11-24 22:01:45,530 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20342fe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:45, skipping insertion in model container [2023-11-24 22:01:45,530 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:01:45" (1/1) ... [2023-11-24 22:01:45,571 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:01:45,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:01:45,914 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-24 22:01:45,931 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:01:45,971 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:01:45,985 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:01:46,036 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:01:46,061 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:01:46,061 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:01:46,071 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:01:46,071 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:46 WrapperNode [2023-11-24 22:01:46,072 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:01:46,073 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:01:46,074 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:01:46,074 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:01:46,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:46" (1/1) ... [2023-11-24 22:01:46,115 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:46" (1/1) ... [2023-11-24 22:01:46,170 INFO L138 Inliner]: procedures = 28, calls = 41, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 148 [2023-11-24 22:01:46,170 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:01:46,172 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:01:46,173 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:01:46,173 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:01:46,187 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:46" (1/1) ... [2023-11-24 22:01:46,188 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:46" (1/1) ... [2023-11-24 22:01:46,215 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:46" (1/1) ... [2023-11-24 22:01:46,254 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 3, 2, 2]. 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]. [2023-11-24 22:01:46,254 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:46" (1/1) ... [2023-11-24 22:01:46,255 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:46" (1/1) ... [2023-11-24 22:01:46,268 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:46" (1/1) ... [2023-11-24 22:01:46,293 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:46" (1/1) ... [2023-11-24 22:01:46,296 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:46" (1/1) ... [2023-11-24 22:01:46,306 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:46" (1/1) ... [2023-11-24 22:01:46,311 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:01:46,320 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:01:46,320 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:01:46,320 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:01:46,321 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:46" (1/1) ... [2023-11-24 22:01:46,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:01:46,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:01:46,357 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:01:46,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:01:46,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:01:46,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-24 22:01:46,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-24 22:01:46,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-24 22:01:46,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-24 22:01:46,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:01:46,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-24 22:01:46,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-24 22:01:46,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-24 22:01:46,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-24 22:01:46,413 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 22:01:46,413 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 22:01:46,414 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 22:01:46,414 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 22:01:46,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 22:01:46,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 22:01:46,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 22:01:46,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:01:46,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:01:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:01:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-24 22:01:46,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-24 22:01:46,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-24 22:01:46,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-24 22:01:46,422 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 22:01:46,660 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:01:46,662 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:01:47,249 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:01:47,682 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:01:47,682 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-24 22:01:47,683 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:01:47 BoogieIcfgContainer [2023-11-24 22:01:47,683 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:01:47,687 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:01:47,687 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:01:47,691 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:01:47,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:01:45" (1/3) ... [2023-11-24 22:01:47,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc5036a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:01:47, skipping insertion in model container [2023-11-24 22:01:47,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:46" (2/3) ... [2023-11-24 22:01:47,695 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc5036a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:01:47, skipping insertion in model container [2023-11-24 22:01:47,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:01:47" (3/3) ... [2023-11-24 22:01:47,697 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2023-11-24 22:01:47,721 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:01:47,722 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-24 22:01:47,722 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 22:01:47,852 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 22:01:47,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 48 transitions, 110 flow [2023-11-24 22:01:47,954 INFO L124 PetriNetUnfolderBase]: 3/46 cut-off events. [2023-11-24 22:01:47,954 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 22:01:47,960 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. [2023-11-24 22:01:47,960 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 48 transitions, 110 flow [2023-11-24 22:01:47,969 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 45 transitions, 102 flow [2023-11-24 22:01:47,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:01:48,002 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;@51cba88e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:01:48,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-24 22:01:48,010 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:01:48,010 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-24 22:01:48,011 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:01:48,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:48,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:01:48,012 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 22:01:48,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:48,020 INFO L85 PathProgramCache]: Analyzing trace with hash 479407, now seen corresponding path program 1 times [2023-11-24 22:01:48,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:48,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280912692] [2023-11-24 22:01:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:48,040 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 [2023-11-24 22:01:48,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:48,044 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:01:48,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:01:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:48,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:01:48,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:48,272 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 [2023-11-24 22:01:48,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:48,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:01:48,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:48,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:01:48,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:48,336 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 [2023-11-24 22:01:48,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:48,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:01:48,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:48,387 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 [2023-11-24 22:01:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:48,416 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:48,417 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:48,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280912692] [2023-11-24 22:01:48,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280912692] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:48,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:48,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:01:48,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697955744] [2023-11-24 22:01:48,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:48,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:48,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:48,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:48,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:48,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-24 22:01:48,544 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) [2023-11-24 22:01:48,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:48,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-24 22:01:48,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:01:48,924 INFO L124 PetriNetUnfolderBase]: 128/359 cut-off events. [2023-11-24 22:01:48,925 INFO L125 PetriNetUnfolderBase]: For 29/30 co-relation queries the response was YES. [2023-11-24 22:01:48,928 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. [2023-11-24 22:01:48,935 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 21 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-11-24 22:01:48,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 142 flow [2023-11-24 22:01:48,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:01:48,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2023-11-24 22:01:48,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6319444444444444 [2023-11-24 22:01:48,954 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 91 transitions. [2023-11-24 22:01:48,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 91 transitions. [2023-11-24 22:01:48,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:01:48,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 91 transitions. [2023-11-24 22:01:48,964 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) [2023-11-24 22:01:48,974 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) [2023-11-24 22:01:48,974 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) [2023-11-24 22:01:48,977 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 102 flow. Second operand 3 states and 91 transitions. [2023-11-24 22:01:48,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 142 flow [2023-11-24 22:01:48,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 134 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 22:01:48,992 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 92 flow [2023-11-24 22:01:48,994 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} [2023-11-24 22:01:48,999 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-11-24 22:01:48,999 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 92 flow [2023-11-24 22:01:49,000 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) [2023-11-24 22:01:49,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:49,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:01:49,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:01:49,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:49,205 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 22:01:49,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:49,207 INFO L85 PathProgramCache]: Analyzing trace with hash 479408, now seen corresponding path program 1 times [2023-11-24 22:01:49,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:49,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715084998] [2023-11-24 22:01:49,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:49,208 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 [2023-11-24 22:01:49,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:49,210 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:01:49,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:01:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:49,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 22:01:49,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:49,359 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 [2023-11-24 22:01:49,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:49,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:01:49,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:49,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:01:49,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:49,405 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 [2023-11-24 22:01:49,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:49,436 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 [2023-11-24 22:01:49,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:49,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 22:01:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:49,546 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:49,547 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:49,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715084998] [2023-11-24 22:01:49,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715084998] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:49,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:49,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:01:49,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976238194] [2023-11-24 22:01:49,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:49,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:01:49,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:49,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:01:49,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:01:49,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-24 22:01:49,745 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) [2023-11-24 22:01:49,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:49,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-24 22:01:49,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:01:50,174 INFO L124 PetriNetUnfolderBase]: 129/362 cut-off events. [2023-11-24 22:01:50,175 INFO L125 PetriNetUnfolderBase]: For 7/8 co-relation queries the response was YES. [2023-11-24 22:01:50,177 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. [2023-11-24 22:01:50,181 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 23 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2023-11-24 22:01:50,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 154 flow [2023-11-24 22:01:50,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:01:50,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:01:50,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2023-11-24 22:01:50,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2023-11-24 22:01:50,184 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 116 transitions. [2023-11-24 22:01:50,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 116 transitions. [2023-11-24 22:01:50,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:01:50,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 116 transitions. [2023-11-24 22:01:50,187 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) [2023-11-24 22:01:50,188 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) [2023-11-24 22:01:50,189 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) [2023-11-24 22:01:50,189 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 92 flow. Second operand 4 states and 116 transitions. [2023-11-24 22:01:50,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 154 flow [2023-11-24 22:01:50,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 148 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:01:50,192 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 115 flow [2023-11-24 22:01:50,193 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} [2023-11-24 22:01:50,194 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-11-24 22:01:50,194 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 115 flow [2023-11-24 22:01:50,194 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) [2023-11-24 22:01:50,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:50,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:01:50,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-24 22:01:50,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:50,403 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 22:01:50,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:50,404 INFO L85 PathProgramCache]: Analyzing trace with hash 479457, now seen corresponding path program 1 times [2023-11-24 22:01:50,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:50,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776490899] [2023-11-24 22:01:50,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:50,405 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 [2023-11-24 22:01:50,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:50,409 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:01:50,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:01:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:50,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 22:01:50,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:50,563 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 22:01:50,563 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 [2023-11-24 22:01:50,608 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-24 22:01:50,608 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 [2023-11-24 22:01:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:50,692 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:50,692 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:50,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776490899] [2023-11-24 22:01:50,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776490899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:50,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:50,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:01:50,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128962333] [2023-11-24 22:01:50,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:50,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:50,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:50,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:50,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:50,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2023-11-24 22:01:50,769 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) [2023-11-24 22:01:50,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:50,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2023-11-24 22:01:50,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:01:51,000 INFO L124 PetriNetUnfolderBase]: 201/413 cut-off events. [2023-11-24 22:01:51,000 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 22:01:51,003 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. [2023-11-24 22:01:51,006 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 27 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-11-24 22:01:51,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 167 flow [2023-11-24 22:01:51,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:51,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:01:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2023-11-24 22:01:51,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-24 22:01:51,012 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 84 transitions. [2023-11-24 22:01:51,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 84 transitions. [2023-11-24 22:01:51,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:01:51,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 84 transitions. [2023-11-24 22:01:51,016 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) [2023-11-24 22:01:51,016 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) [2023-11-24 22:01:51,017 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) [2023-11-24 22:01:51,017 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 115 flow. Second operand 3 states and 84 transitions. [2023-11-24 22:01:51,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 167 flow [2023-11-24 22:01:51,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:01:51,020 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 110 flow [2023-11-24 22:01:51,020 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} [2023-11-24 22:01:51,022 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2023-11-24 22:01:51,022 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 110 flow [2023-11-24 22:01:51,022 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) [2023-11-24 22:01:51,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:51,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:01:51,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-24 22:01:51,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:51,226 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 22:01:51,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:51,226 INFO L85 PathProgramCache]: Analyzing trace with hash 479458, now seen corresponding path program 1 times [2023-11-24 22:01:51,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:51,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273509865] [2023-11-24 22:01:51,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:51,228 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 [2023-11-24 22:01:51,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:51,231 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:01:51,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:01:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:51,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 22:01:51,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:51,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:51,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:51,377 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 [2023-11-24 22:01:51,395 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 [2023-11-24 22:01:51,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:51,446 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 [2023-11-24 22:01:51,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:51,463 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 [2023-11-24 22:01:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:51,627 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:51,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:51,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273509865] [2023-11-24 22:01:51,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273509865] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:51,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:51,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:01:51,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6975703] [2023-11-24 22:01:51,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:51,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:51,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:51,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:51,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:51,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2023-11-24 22:01:51,757 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) [2023-11-24 22:01:51,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:51,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2023-11-24 22:01:51,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:01:52,009 INFO L124 PetriNetUnfolderBase]: 129/300 cut-off events. [2023-11-24 22:01:52,010 INFO L125 PetriNetUnfolderBase]: For 7/8 co-relation queries the response was YES. [2023-11-24 22:01:52,011 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. [2023-11-24 22:01:52,013 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 25 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-24 22:01:52,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 158 flow [2023-11-24 22:01:52,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:52,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:01:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-24 22:01:52,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2023-11-24 22:01:52,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-24 22:01:52,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-24 22:01:52,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:01:52,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-24 22:01:52,017 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) [2023-11-24 22:01:52,018 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) [2023-11-24 22:01:52,018 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) [2023-11-24 22:01:52,018 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 110 flow. Second operand 3 states and 88 transitions. [2023-11-24 22:01:52,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 158 flow [2023-11-24 22:01:52,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:01:52,021 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 107 flow [2023-11-24 22:01:52,021 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} [2023-11-24 22:01:52,022 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2023-11-24 22:01:52,022 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 107 flow [2023-11-24 22:01:52,022 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) [2023-11-24 22:01:52,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:52,023 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-24 22:01:52,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-24 22:01:52,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:52,225 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 22:01:52,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:52,226 INFO L85 PathProgramCache]: Analyzing trace with hash 460725372, now seen corresponding path program 1 times [2023-11-24 22:01:52,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:52,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777517102] [2023-11-24 22:01:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:52,227 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 [2023-11-24 22:01:52,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:52,229 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:01:52,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:01:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:52,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 22:01:52,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:52,342 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 [2023-11-24 22:01:52,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:52,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 22:01:52,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:52,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:01:52,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:52,410 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 [2023-11-24 22:01:52,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:52,424 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 [2023-11-24 22:01:52,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:52,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:01:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:52,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:01:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:53,122 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:53,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777517102] [2023-11-24 22:01:53,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777517102] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:01:53,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:01:53,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 22:01:53,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471513375] [2023-11-24 22:01:53,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:01:53,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 22:01:53,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:53,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 22:01:53,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-24 22:01:54,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-24 22:01:54,038 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) [2023-11-24 22:01:54,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:54,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-24 22:01:54,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:01:55,159 INFO L124 PetriNetUnfolderBase]: 132/309 cut-off events. [2023-11-24 22:01:55,160 INFO L125 PetriNetUnfolderBase]: For 7/8 co-relation queries the response was YES. [2023-11-24 22:01:55,160 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. [2023-11-24 22:01:55,163 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 23 selfloop transitions, 13 changer transitions 0/50 dead transitions. [2023-11-24 22:01:55,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 215 flow [2023-11-24 22:01:55,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 22:01:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 22:01:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2023-11-24 22:01:55,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5395833333333333 [2023-11-24 22:01:55,166 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 259 transitions. [2023-11-24 22:01:55,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 259 transitions. [2023-11-24 22:01:55,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:01:55,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 259 transitions. [2023-11-24 22:01:55,168 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) [2023-11-24 22:01:55,170 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) [2023-11-24 22:01:55,170 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) [2023-11-24 22:01:55,170 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 107 flow. Second operand 10 states and 259 transitions. [2023-11-24 22:01:55,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 215 flow [2023-11-24 22:01:55,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:01:55,174 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 186 flow [2023-11-24 22:01:55,174 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} [2023-11-24 22:01:55,175 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2023-11-24 22:01:55,175 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 186 flow [2023-11-24 22:01:55,176 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) [2023-11-24 22:01:55,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:55,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 22:01:55,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-24 22:01:55,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:55,379 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 22:01:55,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:55,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1399044574, now seen corresponding path program 1 times [2023-11-24 22:01:55,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:55,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668522086] [2023-11-24 22:01:55,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:55,381 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 [2023-11-24 22:01:55,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:55,382 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:01:55,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:01:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:55,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 22:01:55,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:55,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:55,503 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 [2023-11-24 22:01:55,509 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 [2023-11-24 22:01:55,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:55,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:55,543 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 [2023-11-24 22:01:55,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:55,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:55,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:01:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:55,605 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:55,605 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:55,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668522086] [2023-11-24 22:01:55,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668522086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:55,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:55,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:01:55,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697867297] [2023-11-24 22:01:55,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:55,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:55,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:55,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:55,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:55,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2023-11-24 22:01:55,683 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) [2023-11-24 22:01:55,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:55,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2023-11-24 22:01:55,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:01:55,842 INFO L124 PetriNetUnfolderBase]: 132/303 cut-off events. [2023-11-24 22:01:55,842 INFO L125 PetriNetUnfolderBase]: For 16/17 co-relation queries the response was YES. [2023-11-24 22:01:55,843 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. [2023-11-24 22:01:55,845 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 34 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-11-24 22:01:55,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 48 transitions, 252 flow [2023-11-24 22:01:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:55,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:01:55,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-24 22:01:55,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2023-11-24 22:01:55,847 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-24 22:01:55,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-24 22:01:55,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:01:55,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-24 22:01:55,848 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) [2023-11-24 22:01:55,849 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) [2023-11-24 22:01:55,849 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) [2023-11-24 22:01:55,849 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 186 flow. Second operand 3 states and 88 transitions. [2023-11-24 22:01:55,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 48 transitions, 252 flow [2023-11-24 22:01:55,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 222 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-24 22:01:55,856 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 154 flow [2023-11-24 22:01:55,857 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} [2023-11-24 22:01:55,860 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2023-11-24 22:01:55,860 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 154 flow [2023-11-24 22:01:55,861 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) [2023-11-24 22:01:55,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:55,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 22:01:55,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-24 22:01:56,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:56,064 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 22:01:56,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:56,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1399044573, now seen corresponding path program 1 times [2023-11-24 22:01:56,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:56,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518203687] [2023-11-24 22:01:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:56,065 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 [2023-11-24 22:01:56,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:56,066 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:01:56,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:01:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:56,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 22:01:56,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:56,200 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 22:01:56,201 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 [2023-11-24 22:01:56,231 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 22:01:56,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-24 22:01:56,255 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 22:01:56,255 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 [2023-11-24 22:01:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:56,355 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:56,355 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:56,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518203687] [2023-11-24 22:01:56,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518203687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:56,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:56,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:01:56,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477637629] [2023-11-24 22:01:56,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:56,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:56,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:56,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:56,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:56,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2023-11-24 22:01:56,425 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) [2023-11-24 22:01:56,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:56,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2023-11-24 22:01:56,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:01:56,589 INFO L124 PetriNetUnfolderBase]: 144/313 cut-off events. [2023-11-24 22:01:56,589 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-24 22:01:56,590 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. [2023-11-24 22:01:56,592 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 36 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-24 22:01:56,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 46 transitions, 224 flow [2023-11-24 22:01:56,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:56,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:01:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2023-11-24 22:01:56,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-24 22:01:56,594 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 84 transitions. [2023-11-24 22:01:56,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 84 transitions. [2023-11-24 22:01:56,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:01:56,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 84 transitions. [2023-11-24 22:01:56,595 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) [2023-11-24 22:01:56,595 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) [2023-11-24 22:01:56,596 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) [2023-11-24 22:01:56,596 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 154 flow. Second operand 3 states and 84 transitions. [2023-11-24 22:01:56,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 46 transitions, 224 flow [2023-11-24 22:01:56,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 46 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:01:56,599 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 151 flow [2023-11-24 22:01:56,599 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} [2023-11-24 22:01:56,599 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-11-24 22:01:56,600 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 151 flow [2023-11-24 22:01:56,600 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) [2023-11-24 22:01:56,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:56,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:56,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-24 22:01:56,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:56,808 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 22:01:56,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:56,808 INFO L85 PathProgramCache]: Analyzing trace with hash 420749007, now seen corresponding path program 1 times [2023-11-24 22:01:56,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:56,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435252252] [2023-11-24 22:01:56,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:56,809 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 [2023-11-24 22:01:56,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:56,811 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:01:56,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:01:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:56,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 22:01:56,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:56,907 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 [2023-11-24 22:01:56,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:56,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:01:56,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:56,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:01:56,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:56,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 22:01:56,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:56,946 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 [2023-11-24 22:01:56,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:56,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 22:01:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:56,973 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:56,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:56,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435252252] [2023-11-24 22:01:56,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435252252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:56,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:56,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:01:56,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810305082] [2023-11-24 22:01:56,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:56,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:01:56,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:56,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:01:56,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:01:57,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-24 22:01:57,066 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) [2023-11-24 22:01:57,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:57,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-24 22:01:57,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:01:57,258 INFO L124 PetriNetUnfolderBase]: 96/222 cut-off events. [2023-11-24 22:01:57,258 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2023-11-24 22:01:57,259 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. [2023-11-24 22:01:57,262 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 27 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2023-11-24 22:01:57,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 44 transitions, 213 flow [2023-11-24 22:01:57,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:01:57,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:01:57,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2023-11-24 22:01:57,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2023-11-24 22:01:57,265 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 111 transitions. [2023-11-24 22:01:57,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 111 transitions. [2023-11-24 22:01:57,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:01:57,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 111 transitions. [2023-11-24 22:01:57,266 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) [2023-11-24 22:01:57,267 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) [2023-11-24 22:01:57,267 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) [2023-11-24 22:01:57,268 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 151 flow. Second operand 4 states and 111 transitions. [2023-11-24 22:01:57,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 44 transitions, 213 flow [2023-11-24 22:01:57,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 44 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:01:57,271 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 158 flow [2023-11-24 22:01:57,271 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} [2023-11-24 22:01:57,275 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-11-24 22:01:57,275 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 158 flow [2023-11-24 22:01:57,275 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) [2023-11-24 22:01:57,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:57,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:57,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-24 22:01:57,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:57,479 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 22:01:57,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:57,480 INFO L85 PathProgramCache]: Analyzing trace with hash 420749008, now seen corresponding path program 1 times [2023-11-24 22:01:57,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:57,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850611071] [2023-11-24 22:01:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:57,480 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 [2023-11-24 22:01:57,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:57,481 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:01:57,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:01:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:57,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 22:01:57,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:57,576 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 [2023-11-24 22:01:57,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:57,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:01:57,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:57,597 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 [2023-11-24 22:01:57,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:57,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 22:01:57,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:57,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:01:57,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:57,639 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 [2023-11-24 22:01:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:57,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:57,798 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:57,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850611071] [2023-11-24 22:01:57,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850611071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:57,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:57,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:01:57,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780725775] [2023-11-24 22:01:57,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:57,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:01:57,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:57,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:01:57,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:01:58,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-24 22:01:58,111 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) [2023-11-24 22:01:58,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:58,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-24 22:01:58,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:01:58,577 INFO L124 PetriNetUnfolderBase]: 188/380 cut-off events. [2023-11-24 22:01:58,577 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2023-11-24 22:01:58,602 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. [2023-11-24 22:01:58,605 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 44 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2023-11-24 22:01:58,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 312 flow [2023-11-24 22:01:58,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 22:01:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 22:01:58,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2023-11-24 22:01:58,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2023-11-24 22:01:58,607 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 177 transitions. [2023-11-24 22:01:58,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 177 transitions. [2023-11-24 22:01:58,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:01:58,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 177 transitions. [2023-11-24 22:01:58,608 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) [2023-11-24 22:01:58,609 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) [2023-11-24 22:01:58,609 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) [2023-11-24 22:01:58,609 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 158 flow. Second operand 6 states and 177 transitions. [2023-11-24 22:01:58,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 312 flow [2023-11-24 22:01:58,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 65 transitions, 305 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:01:58,612 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 200 flow [2023-11-24 22:01:58,612 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} [2023-11-24 22:01:58,613 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 8 predicate places. [2023-11-24 22:01:58,613 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 200 flow [2023-11-24 22:01:58,613 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) [2023-11-24 22:01:58,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:01:58,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:58,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-24 22:01:58,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:01:58,818 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 22:01:58,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:58,818 INFO L85 PathProgramCache]: Analyzing trace with hash 635101206, now seen corresponding path program 1 times [2023-11-24 22:01:58,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:01:58,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770584794] [2023-11-24 22:01:58,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:58,818 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 [2023-11-24 22:01:58,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:01:58,819 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:01:58,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:01:58,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:58,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 22:01:58,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:58,924 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 [2023-11-24 22:01:58,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:58,949 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 [2023-11-24 22:01:58,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:58,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 22:01:58,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:58,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:01:58,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:58,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:01:58,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:58,996 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 [2023-11-24 22:01:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:59,191 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:59,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:01:59,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770584794] [2023-11-24 22:01:59,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770584794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:59,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:59,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:01:59,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171239510] [2023-11-24 22:01:59,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:59,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:01:59,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:01:59,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:01:59,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:01:59,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-24 22:01:59,534 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) [2023-11-24 22:01:59,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:01:59,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-24 22:01:59,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:00,119 INFO L124 PetriNetUnfolderBase]: 298/579 cut-off events. [2023-11-24 22:02:00,120 INFO L125 PetriNetUnfolderBase]: For 221/254 co-relation queries the response was YES. [2023-11-24 22:02:00,122 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. [2023-11-24 22:02:00,126 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 50 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2023-11-24 22:02:00,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 72 transitions, 412 flow [2023-11-24 22:02:00,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 22:02:00,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 22:02:00,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2023-11-24 22:02:00,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6076388888888888 [2023-11-24 22:02:00,129 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 175 transitions. [2023-11-24 22:02:00,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 175 transitions. [2023-11-24 22:02:00,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:00,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 175 transitions. [2023-11-24 22:02:00,131 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) [2023-11-24 22:02:00,132 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) [2023-11-24 22:02:00,132 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) [2023-11-24 22:02:00,132 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 200 flow. Second operand 6 states and 175 transitions. [2023-11-24 22:02:00,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 72 transitions, 412 flow [2023-11-24 22:02:00,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 72 transitions, 391 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 22:02:00,140 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 234 flow [2023-11-24 22:02:00,142 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} [2023-11-24 22:02:00,143 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 12 predicate places. [2023-11-24 22:02:00,143 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 234 flow [2023-11-24 22:02:00,145 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) [2023-11-24 22:02:00,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:00,145 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-24 22:02:00,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:00,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:02:00,348 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 22:02:00,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:00,349 INFO L85 PathProgramCache]: Analyzing trace with hash 202304992, now seen corresponding path program 2 times [2023-11-24 22:02:00,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:02:00,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688780309] [2023-11-24 22:02:00,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 22:02:00,350 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 [2023-11-24 22:02:00,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:02:00,351 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:02:00,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:02:00,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 22:02:00,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:02:00,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 22:02:00,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:00,513 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 [2023-11-24 22:02:00,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:00,527 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 [2023-11-24 22:02:00,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:00,556 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 [2023-11-24 22:02:00,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:00,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:02:00,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:00,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:02:00,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:00,594 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 [2023-11-24 22:02:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:00,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:02:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:02,030 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:02:02,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688780309] [2023-11-24 22:02:02,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688780309] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:02:02,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:02:02,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-24 22:02:02,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285051512] [2023-11-24 22:02:02,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:02:02,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 22:02:02,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:02:02,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 22:02:02,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-24 22:02:04,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-24 22:02:04,216 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) [2023-11-24 22:02:04,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:04,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-24 22:02:04,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:07,896 INFO L124 PetriNetUnfolderBase]: 278/591 cut-off events. [2023-11-24 22:02:07,896 INFO L125 PetriNetUnfolderBase]: For 436/466 co-relation queries the response was YES. [2023-11-24 22:02:07,898 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. [2023-11-24 22:02:07,903 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 27 selfloop transitions, 31 changer transitions 0/70 dead transitions. [2023-11-24 22:02:07,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 70 transitions, 452 flow [2023-11-24 22:02:07,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-24 22:02:07,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-24 22:02:07,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 542 transitions. [2023-11-24 22:02:07,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132575757575758 [2023-11-24 22:02:07,908 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 542 transitions. [2023-11-24 22:02:07,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 542 transitions. [2023-11-24 22:02:07,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:07,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 542 transitions. [2023-11-24 22:02:07,911 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) [2023-11-24 22:02:07,914 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) [2023-11-24 22:02:07,914 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) [2023-11-24 22:02:07,915 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 234 flow. Second operand 22 states and 542 transitions. [2023-11-24 22:02:07,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 70 transitions, 452 flow [2023-11-24 22:02:07,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 70 transitions, 425 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 22:02:07,920 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 401 flow [2023-11-24 22:02:07,920 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} [2023-11-24 22:02:07,921 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 36 predicate places. [2023-11-24 22:02:07,921 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 401 flow [2023-11-24 22:02:07,921 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) [2023-11-24 22:02:07,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:07,922 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:07,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:08,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:02:08,125 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 22:02:08,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:08,125 INFO L85 PathProgramCache]: Analyzing trace with hash 573619637, now seen corresponding path program 1 times [2023-11-24 22:02:08,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:02:08,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220255521] [2023-11-24 22:02:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:08,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:02:08,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:02:08,127 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:02:08,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:02:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:08,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-24 22:02:08,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:08,255 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 [2023-11-24 22:02:08,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:08,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:02:08,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:08,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:02:08,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:08,294 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 [2023-11-24 22:02:08,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:08,319 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 [2023-11-24 22:02:08,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:08,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:02:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:08,528 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:02:08,528 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:02:08,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220255521] [2023-11-24 22:02:08,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220255521] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:08,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:08,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:02:08,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504970241] [2023-11-24 22:02:08,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:08,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:02:08,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:02:08,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:02:08,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:02:08,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2023-11-24 22:02:08,724 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) [2023-11-24 22:02:08,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:08,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2023-11-24 22:02:08,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:09,176 INFO L124 PetriNetUnfolderBase]: 279/598 cut-off events. [2023-11-24 22:02:09,176 INFO L125 PetriNetUnfolderBase]: For 388/432 co-relation queries the response was YES. [2023-11-24 22:02:09,179 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. [2023-11-24 22:02:09,184 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 68 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2023-11-24 22:02:09,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 596 flow [2023-11-24 22:02:09,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:02:09,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 22:02:09,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2023-11-24 22:02:09,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2023-11-24 22:02:09,186 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 158 transitions. [2023-11-24 22:02:09,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 158 transitions. [2023-11-24 22:02:09,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:09,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 158 transitions. [2023-11-24 22:02:09,187 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) [2023-11-24 22:02:09,188 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) [2023-11-24 22:02:09,189 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) [2023-11-24 22:02:09,189 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 401 flow. Second operand 5 states and 158 transitions. [2023-11-24 22:02:09,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 596 flow [2023-11-24 22:02:09,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 86 transitions, 516 flow, removed 27 selfloop flow, removed 9 redundant places. [2023-11-24 22:02:09,195 INFO L231 Difference]: Finished difference. Result has 82 places, 72 transitions, 358 flow [2023-11-24 22:02:09,196 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} [2023-11-24 22:02:09,197 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 33 predicate places. [2023-11-24 22:02:09,197 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 72 transitions, 358 flow [2023-11-24 22:02:09,197 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) [2023-11-24 22:02:09,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:09,197 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:09,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:09,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:02:09,400 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 22:02:09,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:09,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1512897921, now seen corresponding path program 1 times [2023-11-24 22:02:09,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:02:09,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039901306] [2023-11-24 22:02:09,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:09,401 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 [2023-11-24 22:02:09,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:02:09,402 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:02:09,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:02:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:09,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-24 22:02:09,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:09,523 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 [2023-11-24 22:02:09,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:09,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:02:09,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:09,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:02:09,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:09,560 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 [2023-11-24 22:02:09,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:09,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:02:09,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:09,583 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 [2023-11-24 22:02:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 22:02:09,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:02:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 22:02:10,745 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:02:10,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039901306] [2023-11-24 22:02:10,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039901306] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:02:10,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:02:10,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-24 22:02:10,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822710726] [2023-11-24 22:02:10,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:02:10,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 22:02:10,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:02:10,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 22:02:10,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-24 22:02:12,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-24 22:02:12,522 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) [2023-11-24 22:02:12,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:12,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-24 22:02:12,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:15,352 INFO L124 PetriNetUnfolderBase]: 638/1239 cut-off events. [2023-11-24 22:02:15,353 INFO L125 PetriNetUnfolderBase]: For 1216/1306 co-relation queries the response was YES. [2023-11-24 22:02:15,358 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. [2023-11-24 22:02:15,367 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 140 selfloop transitions, 30 changer transitions 0/181 dead transitions. [2023-11-24 22:02:15,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 181 transitions, 1165 flow [2023-11-24 22:02:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 22:02:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-24 22:02:15,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 402 transitions. [2023-11-24 22:02:15,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6442307692307693 [2023-11-24 22:02:15,372 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 402 transitions. [2023-11-24 22:02:15,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 402 transitions. [2023-11-24 22:02:15,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:15,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 402 transitions. [2023-11-24 22:02:15,374 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) [2023-11-24 22:02:15,376 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) [2023-11-24 22:02:15,376 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) [2023-11-24 22:02:15,376 INFO L175 Difference]: Start difference. First operand has 82 places, 72 transitions, 358 flow. Second operand 13 states and 402 transitions. [2023-11-24 22:02:15,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 181 transitions, 1165 flow [2023-11-24 22:02:15,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 181 transitions, 1160 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:02:15,384 INFO L231 Difference]: Finished difference. Result has 96 places, 83 transitions, 511 flow [2023-11-24 22:02:15,385 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} [2023-11-24 22:02:15,385 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 47 predicate places. [2023-11-24 22:02:15,385 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 83 transitions, 511 flow [2023-11-24 22:02:15,386 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) [2023-11-24 22:02:15,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:15,386 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:15,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:15,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:02:15,589 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 22:02:15,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:15,590 INFO L85 PathProgramCache]: Analyzing trace with hash 319900335, now seen corresponding path program 1 times [2023-11-24 22:02:15,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:02:15,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506798112] [2023-11-24 22:02:15,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:15,590 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 [2023-11-24 22:02:15,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:02:15,592 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:02:15,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:02:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:15,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-24 22:02:15,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:15,715 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 [2023-11-24 22:02:15,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:15,725 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 8 treesize of output 1 [2023-11-24 22:02:15,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:15,746 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 [2023-11-24 22:02:15,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:15,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:02:15,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:15,764 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 [2023-11-24 22:02:15,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:15,773 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 [2023-11-24 22:02:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 22:02:16,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:02:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 22:02:16,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:02:16,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506798112] [2023-11-24 22:02:16,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506798112] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:02:16,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:02:16,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-24 22:02:16,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877418689] [2023-11-24 22:02:16,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:02:16,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 22:02:16,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:02:16,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 22:02:16,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-24 22:02:18,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2023-11-24 22:02:18,866 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) [2023-11-24 22:02:18,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:18,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2023-11-24 22:02:18,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:21,616 INFO L124 PetriNetUnfolderBase]: 1144/2086 cut-off events. [2023-11-24 22:02:21,616 INFO L125 PetriNetUnfolderBase]: For 5390/5623 co-relation queries the response was YES. [2023-11-24 22:02:21,626 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. [2023-11-24 22:02:21,639 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 195 selfloop transitions, 29 changer transitions 2/241 dead transitions. [2023-11-24 22:02:21,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 241 transitions, 2135 flow [2023-11-24 22:02:21,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 22:02:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-24 22:02:21,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 392 transitions. [2023-11-24 22:02:21,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2023-11-24 22:02:21,642 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 392 transitions. [2023-11-24 22:02:21,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 392 transitions. [2023-11-24 22:02:21,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:21,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 392 transitions. [2023-11-24 22:02:21,645 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) [2023-11-24 22:02:21,651 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) [2023-11-24 22:02:21,652 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) [2023-11-24 22:02:21,652 INFO L175 Difference]: Start difference. First operand has 96 places, 83 transitions, 511 flow. Second operand 13 states and 392 transitions. [2023-11-24 22:02:21,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 241 transitions, 2135 flow [2023-11-24 22:02:21,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 241 transitions, 1952 flow, removed 60 selfloop flow, removed 4 redundant places. [2023-11-24 22:02:21,670 INFO L231 Difference]: Finished difference. Result has 108 places, 94 transitions, 634 flow [2023-11-24 22:02:21,671 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} [2023-11-24 22:02:21,671 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 59 predicate places. [2023-11-24 22:02:21,672 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 94 transitions, 634 flow [2023-11-24 22:02:21,672 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) [2023-11-24 22:02:21,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:21,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:21,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:21,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:02:21,876 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 22:02:21,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:21,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1462742821, now seen corresponding path program 1 times [2023-11-24 22:02:21,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:02:21,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722518540] [2023-11-24 22:02:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:21,877 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 [2023-11-24 22:02:21,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:02:21,878 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:02:21,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:02:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:21,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 22:02:21,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:21,988 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:02:21,989 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:02:21,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722518540] [2023-11-24 22:02:21,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722518540] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:21,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:21,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:02:21,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203286613] [2023-11-24 22:02:21,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:21,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:21,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:02:21,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:21,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:21,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2023-11-24 22:02:21,994 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) [2023-11-24 22:02:21,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:21,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2023-11-24 22:02:21,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:22,533 INFO L124 PetriNetUnfolderBase]: 1389/2561 cut-off events. [2023-11-24 22:02:22,533 INFO L125 PetriNetUnfolderBase]: For 7337/7516 co-relation queries the response was YES. [2023-11-24 22:02:22,547 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. [2023-11-24 22:02:22,635 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 83 selfloop transitions, 3 changer transitions 4/109 dead transitions. [2023-11-24 22:02:22,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 109 transitions, 899 flow [2023-11-24 22:02:22,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:22,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2023-11-24 22:02:22,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2023-11-24 22:02:22,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 100 transitions. [2023-11-24 22:02:22,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 100 transitions. [2023-11-24 22:02:22,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:22,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 100 transitions. [2023-11-24 22:02:22,639 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) [2023-11-24 22:02:22,639 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) [2023-11-24 22:02:22,640 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) [2023-11-24 22:02:22,640 INFO L175 Difference]: Start difference. First operand has 108 places, 94 transitions, 634 flow. Second operand 3 states and 100 transitions. [2023-11-24 22:02:22,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 109 transitions, 899 flow [2023-11-24 22:02:22,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 109 transitions, 861 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-24 22:02:22,657 INFO L231 Difference]: Finished difference. Result has 107 places, 93 transitions, 589 flow [2023-11-24 22:02:22,658 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} [2023-11-24 22:02:22,658 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 58 predicate places. [2023-11-24 22:02:22,658 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 93 transitions, 589 flow [2023-11-24 22:02:22,659 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) [2023-11-24 22:02:22,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:22,659 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2023-11-24 22:02:22,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:22,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:02:22,862 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 22:02:22,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:22,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1156841560, now seen corresponding path program 3 times [2023-11-24 22:02:22,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:02:22,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398259806] [2023-11-24 22:02:22,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 22:02:22,864 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 [2023-11-24 22:02:22,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:02:22,865 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:02:22,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995c8a34-767f-4dcf-aa41-1d815eb91510/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:02:23,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-24 22:02:23,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:02:23,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-24 22:02:23,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:23,203 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 [2023-11-24 22:02:23,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:23,224 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 [2023-11-24 22:02:23,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:23,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:02:23,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:23,246 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 [2023-11-24 22:02:23,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:23,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 22:02:23,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:23,265 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 [2023-11-24 22:02:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:24,045 INFO L327 TraceCheckSpWp]: Computing backward predicates...