./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.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_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:46:51,093 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:46:51,173 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 02:46:51,179 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:46:51,179 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:46:51,210 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:46:51,211 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:46:51,211 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:46:51,212 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:46:51,213 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:46:51,213 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:46:51,214 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:46:51,214 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:46:51,215 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:46:51,215 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:46:51,216 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:46:51,216 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:46:51,217 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:46:51,217 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:46:51,218 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:46:51,218 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 02:46:51,219 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 02:46:51,219 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 02:46:51,220 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:46:51,220 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 02:46:51,221 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 02:46:51,221 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:46:51,222 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:46:51,222 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:46:51,223 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:46:51,223 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:46:51,224 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:46:51,224 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:46:51,224 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:46:51,225 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:46:51,225 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:46:51,225 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:46:51,225 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:46:51,225 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:46:51,226 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:46:51,226 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:46:51,226 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_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2023-11-29 02:46:51,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:46:51,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:46:51,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:46:51,498 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:46:51,498 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:46:51,500 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2023-11-29 02:46:54,258 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:46:54,442 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:46:54,442 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2023-11-29 02:46:54,451 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/data/e1cc5ae0c/9e3a2fe0995f4b57ae8a4678e1164958/FLAG161d21ac9 [2023-11-29 02:46:54,463 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/data/e1cc5ae0c/9e3a2fe0995f4b57ae8a4678e1164958 [2023-11-29 02:46:54,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:46:54,466 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:46:54,468 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:46:54,468 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:46:54,473 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:46:54,474 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:46:54" (1/1) ... [2023-11-29 02:46:54,475 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@162e39b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:46:54, skipping insertion in model container [2023-11-29 02:46:54,475 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:46:54" (1/1) ... [2023-11-29 02:46:54,503 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:46:54,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:46:54,714 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-29 02:46:54,714 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@36e7da77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:46:54, skipping insertion in model container [2023-11-29 02:46:54,715 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:46:54,715 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-29 02:46:54,716 INFO L158 Benchmark]: Toolchain (without parser) took 249.52ms. Allocated memory is still 157.3MB. Free memory was 89.7MB in the beginning and 124.2MB in the end (delta: -34.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 02:46:54,717 INFO L158 Benchmark]: CDTParser took 0.52ms. Allocated memory is still 157.3MB. Free memory was 130.4MB in the beginning and 130.3MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 02:46:54,718 INFO L158 Benchmark]: CACSL2BoogieTranslator took 247.36ms. Allocated memory is still 157.3MB. Free memory was 89.6MB in the beginning and 124.2MB in the end (delta: -34.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 02:46:54,719 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52ms. Allocated memory is still 157.3MB. Free memory was 130.4MB in the beginning and 130.3MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 247.36ms. Allocated memory is still 157.3MB. Free memory was 89.6MB in the beginning and 124.2MB in the end (delta: -34.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 171]: 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_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:46:56,485 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:46:56,555 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 02:46:56,561 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:46:56,569 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:46:56,599 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:46:56,600 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:46:56,601 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:46:56,602 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:46:56,602 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:46:56,603 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:46:56,603 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:46:56,604 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:46:56,605 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:46:56,605 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:46:56,606 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:46:56,606 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:46:56,607 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:46:56,607 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:46:56,608 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:46:56,609 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 02:46:56,609 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 02:46:56,610 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 02:46:56,610 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:46:56,611 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 02:46:56,611 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 02:46:56,611 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 02:46:56,612 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 02:46:56,612 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:46:56,613 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:46:56,613 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:46:56,614 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:46:56,614 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:46:56,614 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:46:56,614 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:46:56,615 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:46:56,615 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:46:56,615 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 02:46:56,615 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 02:46:56,616 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:46:56,616 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:46:56,616 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:46:56,616 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:46:56,617 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 02:46:56,617 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_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2023-11-29 02:46:56,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:46:56,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:46:56,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:46:56,952 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:46:56,952 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:46:56,954 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2023-11-29 02:46:59,744 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:46:59,933 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:46:59,933 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2023-11-29 02:46:59,944 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/data/81735a04e/ed7d9cbfac0f498281e53b7e2e50dd18/FLAG6ac94530c [2023-11-29 02:46:59,960 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/data/81735a04e/ed7d9cbfac0f498281e53b7e2e50dd18 [2023-11-29 02:46:59,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:46:59,965 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:46:59,967 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:46:59,967 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:46:59,973 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:46:59,974 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:46:59" (1/1) ... [2023-11-29 02:46:59,975 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ec4188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:46:59, skipping insertion in model container [2023-11-29 02:46:59,975 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:46:59" (1/1) ... [2023-11-29 02:47:00,007 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:47:00,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:47:00,246 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 02:47:00,252 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:47:00,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:47:00,285 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:47:00,317 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:47:00,329 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:47:00,330 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:47:00,338 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:47:00,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:00 WrapperNode [2023-11-29 02:47:00,339 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:47:00,340 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:47:00,340 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:47:00,340 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:47:00,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:00" (1/1) ... [2023-11-29 02:47:00,361 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:00" (1/1) ... [2023-11-29 02:47:00,393 INFO L138 Inliner]: procedures = 27, calls = 69, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 343 [2023-11-29 02:47:00,393 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:47:00,394 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:47:00,394 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:47:00,394 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:47:00,406 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:00" (1/1) ... [2023-11-29 02:47:00,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:00" (1/1) ... [2023-11-29 02:47:00,413 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:00" (1/1) ... [2023-11-29 02:47:00,433 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 2, 11, 2, 2]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 3, 1, 1]. [2023-11-29 02:47:00,434 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:00" (1/1) ... [2023-11-29 02:47:00,434 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:00" (1/1) ... [2023-11-29 02:47:00,450 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:00" (1/1) ... [2023-11-29 02:47:00,455 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:00" (1/1) ... [2023-11-29 02:47:00,459 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:00" (1/1) ... [2023-11-29 02:47:00,462 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:00" (1/1) ... [2023-11-29 02:47:00,467 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:47:00,468 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:47:00,468 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:47:00,469 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:47:00,469 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:00" (1/1) ... [2023-11-29 02:47:00,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:47:00,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:47:00,502 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:47:00,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:47:00,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:47:00,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 02:47:00,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 02:47:00,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 02:47:00,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 02:47:00,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-29 02:47:00,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:47:00,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 02:47:00,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 02:47:00,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 02:47:00,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 02:47:00,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-29 02:47:00,535 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 02:47:00,535 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 02:47:00,535 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 02:47:00,536 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 02:47:00,536 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 02:47:00,536 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 02:47:00,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 02:47:00,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 02:47:00,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 02:47:00,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:47:00,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:47:00,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:47:00,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 02:47:00,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 02:47:00,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 02:47:00,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 02:47:00,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-29 02:47:00,539 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 02:47:00,675 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:47:00,677 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:47:01,479 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:47:01,949 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:47:01,949 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-29 02:47:01,950 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:47:01 BoogieIcfgContainer [2023-11-29 02:47:01,950 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:47:01,952 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:47:01,953 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:47:01,956 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:47:01,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:46:59" (1/3) ... [2023-11-29 02:47:01,957 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79884358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:47:01, skipping insertion in model container [2023-11-29 02:47:01,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:00" (2/3) ... [2023-11-29 02:47:01,957 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79884358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:47:01, skipping insertion in model container [2023-11-29 02:47:01,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:47:01" (3/3) ... [2023-11-29 02:47:01,959 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2023-11-29 02:47:01,978 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:47:01,979 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-11-29 02:47:01,979 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 02:47:02,095 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 02:47:02,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 108 transitions, 237 flow [2023-11-29 02:47:02,192 INFO L124 PetriNetUnfolderBase]: 17/105 cut-off events. [2023-11-29 02:47:02,192 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 02:47:02,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 105 events. 17/105 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 298 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2023-11-29 02:47:02,197 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 108 transitions, 237 flow [2023-11-29 02:47:02,204 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 104 transitions, 226 flow [2023-11-29 02:47:02,214 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:47:02,221 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;@6b88514a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:47:02,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2023-11-29 02:47:02,226 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:47:02,227 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-29 02:47:02,227 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:47:02,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:47:02,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 02:47:02,228 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:47:02,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:02,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1058736, now seen corresponding path program 1 times [2023-11-29 02:47:02,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:47:02,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210748821] [2023-11-29 02:47:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:02,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:02,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:47:02,250 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:47:02,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-29 02:47:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:47:02,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:47:02,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:47:02,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 02:47:02,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:47:02,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:47:02,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:47:02,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,540 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 11 treesize of output 1 [2023-11-29 02:47:02,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:47:02,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:47:02,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:47:02,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,589 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 11 treesize of output 1 [2023-11-29 02:47:02,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:47:02,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:47:02,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:47:02,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 02:47:02,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:47:02,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:47:02,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:47:02,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:47:02,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:47:02,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:47:02,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:47:02,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:47:02,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:47:02,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:47:02,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:02,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:47:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:02,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:47:02,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:47:02,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210748821] [2023-11-29 02:47:02,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210748821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:47:02,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:47:02,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:47:02,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925685074] [2023-11-29 02:47:02,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:47:02,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:47:02,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:47:02,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:47:02,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:47:02,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 108 [2023-11-29 02:47:02,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 104 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:02,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:47:02,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 108 [2023-11-29 02:47:02,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:47:04,580 INFO L124 PetriNetUnfolderBase]: 5347/10128 cut-off events. [2023-11-29 02:47:04,581 INFO L125 PetriNetUnfolderBase]: For 328/329 co-relation queries the response was YES. [2023-11-29 02:47:04,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17508 conditions, 10128 events. 5347/10128 cut-off events. For 328/329 co-relation queries the response was YES. Maximal size of possible extension queue 962. Compared 93545 event pairs, 3814 based on Foata normal form. 572/5056 useless extension candidates. Maximal degree in co-relation 16693. Up to 7076 conditions per place. [2023-11-29 02:47:04,710 INFO L140 encePairwiseOnDemand]: 99/108 looper letters, 51 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2023-11-29 02:47:04,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 96 transitions, 316 flow [2023-11-29 02:47:04,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:47:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:47:04,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2023-11-29 02:47:04,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6203703703703703 [2023-11-29 02:47:04,727 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2023-11-29 02:47:04,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2023-11-29 02:47:04,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:47:04,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2023-11-29 02:47:04,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:04,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:04,740 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:04,742 INFO L175 Difference]: Start difference. First operand has 97 places, 104 transitions, 226 flow. Second operand 3 states and 201 transitions. [2023-11-29 02:47:04,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 96 transitions, 316 flow [2023-11-29 02:47:04,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 96 transitions, 304 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 02:47:04,757 INFO L231 Difference]: Finished difference. Result has 88 places, 96 transitions, 202 flow [2023-11-29 02:47:04,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=88, PETRI_TRANSITIONS=96} [2023-11-29 02:47:04,764 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -9 predicate places. [2023-11-29 02:47:04,764 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 96 transitions, 202 flow [2023-11-29 02:47:04,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:04,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:47:04,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 02:47:04,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:47:04,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:04,969 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:47:04,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:04,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1058737, now seen corresponding path program 1 times [2023-11-29 02:47:04,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:47:04,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484508857] [2023-11-29 02:47:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:04,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:04,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:47:04,972 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:47:04,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-29 02:47:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:47:05,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:47:05,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:47:05,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 02:47:05,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:47:05,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:47:05,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:05,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:05,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:47:05,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:05,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:47:05,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:47:05,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:05,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:47:05,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,231 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:05,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:47:05,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:05,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:47:05,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:05,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:47:05,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:05,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 02:47:05,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:47:05,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:05,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:47:05,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:47:05,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:05,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:05,501 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:47:05,501 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:47:05,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484508857] [2023-11-29 02:47:05,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484508857] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:47:05,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:47:05,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:47:05,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272888976] [2023-11-29 02:47:05,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:47:05,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:47:05,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:47:05,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:47:05,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:47:05,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 108 [2023-11-29 02:47:05,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 96 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:05,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:47:05,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 108 [2023-11-29 02:47:05,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:47:07,451 INFO L124 PetriNetUnfolderBase]: 5350/10137 cut-off events. [2023-11-29 02:47:07,451 INFO L125 PetriNetUnfolderBase]: For 73/74 co-relation queries the response was YES. [2023-11-29 02:47:07,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17348 conditions, 10137 events. 5350/10137 cut-off events. For 73/74 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 93728 event pairs, 3814 based on Foata normal form. 0/4489 useless extension candidates. Maximal degree in co-relation 17298. Up to 7089 conditions per place. [2023-11-29 02:47:07,510 INFO L140 encePairwiseOnDemand]: 95/108 looper letters, 55 selfloop transitions, 10 changer transitions 0/105 dead transitions. [2023-11-29 02:47:07,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 105 transitions, 352 flow [2023-11-29 02:47:07,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:47:07,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:47:07,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 256 transitions. [2023-11-29 02:47:07,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2023-11-29 02:47:07,514 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 256 transitions. [2023-11-29 02:47:07,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 256 transitions. [2023-11-29 02:47:07,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:47:07,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 256 transitions. [2023-11-29 02:47:07,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:07,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:07,520 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:07,520 INFO L175 Difference]: Start difference. First operand has 88 places, 96 transitions, 202 flow. Second operand 4 states and 256 transitions. [2023-11-29 02:47:07,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 105 transitions, 352 flow [2023-11-29 02:47:07,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 105 transitions, 346 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:47:07,523 INFO L231 Difference]: Finished difference. Result has 92 places, 105 transitions, 280 flow [2023-11-29 02:47:07,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=280, PETRI_PLACES=92, PETRI_TRANSITIONS=105} [2023-11-29 02:47:07,524 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -5 predicate places. [2023-11-29 02:47:07,525 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 105 transitions, 280 flow [2023-11-29 02:47:07,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:07,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:47:07,525 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-29 02:47:07,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-29 02:47:07,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:07,728 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:47:07,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:07,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1017481529, now seen corresponding path program 1 times [2023-11-29 02:47:07,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:47:07,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284066400] [2023-11-29 02:47:07,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:07,730 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:07,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:47:07,731 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:47:07,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-29 02:47:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:47:07,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:47:07,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:47:07,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 02:47:07,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:07,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:07,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:07,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:47:07,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:07,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:07,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:07,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:47:07,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:07,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:07,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:07,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:47:07,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:07,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:07,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:07,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:47:07,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:07,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 02:47:07,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:07,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:08,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:08,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:47:08,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:08,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:47:08,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:08,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:08,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:08,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:08,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:08,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:47:08,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:08,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:08,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:08,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:47:08,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:08,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:47:08,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:08,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:08,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:08,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:47:08,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:08,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:08,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:08,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:08,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:08,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:47:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:08,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:47:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:08,701 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:47:08,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284066400] [2023-11-29 02:47:08,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284066400] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:47:08,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:47:08,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 02:47:08,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838043914] [2023-11-29 02:47:08,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:47:08,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:47:08,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:47:08,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:47:08,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:47:09,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 108 [2023-11-29 02:47:09,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 105 transitions, 280 flow. Second operand has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:09,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:47:09,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 108 [2023-11-29 02:47:09,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:47:13,962 INFO L124 PetriNetUnfolderBase]: 5359/10164 cut-off events. [2023-11-29 02:47:13,962 INFO L125 PetriNetUnfolderBase]: For 81/82 co-relation queries the response was YES. [2023-11-29 02:47:14,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17466 conditions, 10164 events. 5359/10164 cut-off events. For 81/82 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 93862 event pairs, 3814 based on Foata normal form. 0/4516 useless extension candidates. Maximal degree in co-relation 17312. Up to 7092 conditions per place. [2023-11-29 02:47:14,061 INFO L140 encePairwiseOnDemand]: 95/108 looper letters, 55 selfloop transitions, 37 changer transitions 0/132 dead transitions. [2023-11-29 02:47:14,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 132 transitions, 584 flow [2023-11-29 02:47:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:47:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 02:47:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 571 transitions. [2023-11-29 02:47:14,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5287037037037037 [2023-11-29 02:47:14,066 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 571 transitions. [2023-11-29 02:47:14,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 571 transitions. [2023-11-29 02:47:14,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:47:14,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 571 transitions. [2023-11-29 02:47:14,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 57.1) internal successors, (571), 10 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:14,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 108.0) internal successors, (1188), 11 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:14,075 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 108.0) internal successors, (1188), 11 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:14,075 INFO L175 Difference]: Start difference. First operand has 92 places, 105 transitions, 280 flow. Second operand 10 states and 571 transitions. [2023-11-29 02:47:14,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 132 transitions, 584 flow [2023-11-29 02:47:14,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 132 transitions, 584 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 02:47:14,081 INFO L231 Difference]: Finished difference. Result has 104 places, 132 transitions, 524 flow [2023-11-29 02:47:14,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=524, PETRI_PLACES=104, PETRI_TRANSITIONS=132} [2023-11-29 02:47:14,082 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 7 predicate places. [2023-11-29 02:47:14,083 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 132 transitions, 524 flow [2023-11-29 02:47:14,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:14,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:47:14,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:47:14,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-29 02:47:14,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:14,286 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:47:14,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:14,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1017457441, now seen corresponding path program 1 times [2023-11-29 02:47:14,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:47:14,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996427300] [2023-11-29 02:47:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:14,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:14,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:47:14,289 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:47:14,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-29 02:47:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:47:14,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:47:14,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:47:14,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:14,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:14,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:14,481 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 02:47:14,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 18 [2023-11-29 02:47:14,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:14,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:14,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:14,539 INFO L349 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-11-29 02:47:14,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 1 [2023-11-29 02:47:14,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:14,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:14,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:14,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-29 02:47:14,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:14,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:14,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:14,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:14,608 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:47:14,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-29 02:47:14,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:14,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:14,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:14,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-29 02:47:14,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:14,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:14,668 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:47:14,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 02:47:14,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:14,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 02:47:14,756 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 02:47:14,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 02:47:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:14,796 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:47:14,796 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:47:14,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996427300] [2023-11-29 02:47:14,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996427300] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:47:14,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:47:14,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:47:14,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819127940] [2023-11-29 02:47:14,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:47:14,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:47:14,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:47:14,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:47:14,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:47:14,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 108 [2023-11-29 02:47:14,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 132 transitions, 524 flow. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:14,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:47:14,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 108 [2023-11-29 02:47:14,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:47:16,073 INFO L124 PetriNetUnfolderBase]: 5359/9491 cut-off events. [2023-11-29 02:47:16,073 INFO L125 PetriNetUnfolderBase]: For 113/114 co-relation queries the response was YES. [2023-11-29 02:47:16,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16856 conditions, 9491 events. 5359/9491 cut-off events. For 113/114 co-relation queries the response was YES. Maximal size of possible extension queue 913. Compared 81409 event pairs, 3814 based on Foata normal form. 769/5291 useless extension candidates. Maximal degree in co-relation 16767. Up to 7120 conditions per place. [2023-11-29 02:47:16,133 INFO L140 encePairwiseOnDemand]: 105/108 looper letters, 88 selfloop transitions, 1 changer transitions 0/130 dead transitions. [2023-11-29 02:47:16,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 130 transitions, 698 flow [2023-11-29 02:47:16,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:47:16,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:47:16,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2023-11-29 02:47:16,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141975308641975 [2023-11-29 02:47:16,135 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2023-11-29 02:47:16,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2023-11-29 02:47:16,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:47:16,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2023-11-29 02:47:16,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:16,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:16,138 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:16,138 INFO L175 Difference]: Start difference. First operand has 104 places, 132 transitions, 524 flow. Second operand 3 states and 199 transitions. [2023-11-29 02:47:16,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 130 transitions, 698 flow [2023-11-29 02:47:16,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 130 transitions, 603 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-11-29 02:47:16,144 INFO L231 Difference]: Finished difference. Result has 100 places, 130 transitions, 427 flow [2023-11-29 02:47:16,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=427, PETRI_PLACES=100, PETRI_TRANSITIONS=130} [2023-11-29 02:47:16,145 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 3 predicate places. [2023-11-29 02:47:16,145 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 130 transitions, 427 flow [2023-11-29 02:47:16,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:16,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:47:16,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:47:16,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-29 02:47:16,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:16,347 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:47:16,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:16,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1017457442, now seen corresponding path program 1 times [2023-11-29 02:47:16,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:47:16,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551342772] [2023-11-29 02:47:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:16,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:16,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:47:16,349 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:47:16,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-29 02:47:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:47:16,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:47:16,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:47:16,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:16,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:16,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 02:47:16,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:16,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 02:47:16,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:16,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:16,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:16,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:16,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 02:47:16,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:16,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:16,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:16,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:47:16,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:16,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:16,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:47:16,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:16,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:16,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:47:16,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:16,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:16,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:16,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:47:16,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:16,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 02:47:16,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:16,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 02:47:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:16,781 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:47:16,781 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:47:16,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551342772] [2023-11-29 02:47:16,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551342772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:47:16,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:47:16,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:47:16,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53000670] [2023-11-29 02:47:16,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:47:16,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:47:16,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:47:16,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:47:16,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:47:16,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 108 [2023-11-29 02:47:16,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 130 transitions, 427 flow. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:16,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:47:16,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 108 [2023-11-29 02:47:16,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:47:17,894 INFO L124 PetriNetUnfolderBase]: 5359/8818 cut-off events. [2023-11-29 02:47:17,894 INFO L125 PetriNetUnfolderBase]: For 93/94 co-relation queries the response was YES. [2023-11-29 02:47:17,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16138 conditions, 8818 events. 5359/8818 cut-off events. For 93/94 co-relation queries the response was YES. Maximal size of possible extension queue 841. Compared 69351 event pairs, 3814 based on Foata normal form. 769/5289 useless extension candidates. Maximal degree in co-relation 16125. Up to 7120 conditions per place. [2023-11-29 02:47:17,950 INFO L140 encePairwiseOnDemand]: 105/108 looper letters, 88 selfloop transitions, 1 changer transitions 0/128 dead transitions. [2023-11-29 02:47:17,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 128 transitions, 601 flow [2023-11-29 02:47:17,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:47:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:47:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2023-11-29 02:47:17,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141975308641975 [2023-11-29 02:47:17,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2023-11-29 02:47:17,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2023-11-29 02:47:17,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:47:17,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2023-11-29 02:47:17,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:17,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:17,955 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:17,955 INFO L175 Difference]: Start difference. First operand has 100 places, 130 transitions, 427 flow. Second operand 3 states and 199 transitions. [2023-11-29 02:47:17,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 128 transitions, 601 flow [2023-11-29 02:47:17,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 128 transitions, 600 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:47:17,960 INFO L231 Difference]: Finished difference. Result has 99 places, 128 transitions, 424 flow [2023-11-29 02:47:17,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=424, PETRI_PLACES=99, PETRI_TRANSITIONS=128} [2023-11-29 02:47:17,962 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 2 predicate places. [2023-11-29 02:47:17,962 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 128 transitions, 424 flow [2023-11-29 02:47:17,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:17,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:47:17,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:47:17,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-29 02:47:18,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:18,166 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:47:18,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:18,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1491512107, now seen corresponding path program 1 times [2023-11-29 02:47:18,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:47:18,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106135684] [2023-11-29 02:47:18,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:18,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:18,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:47:18,168 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:47:18,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-29 02:47:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:47:18,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:47:18,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:47:18,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:18,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:18,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 02:47:18,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:18,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:18,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:18,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:47:18,354 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:47:18,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:18,375 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:47:18,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:18,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:18,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:18,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 02:47:18,438 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:47:18,444 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:47:18,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:18,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:18,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:18,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:47:18,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:18,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:18,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:47:18,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:18,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 02:47:18,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:18,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 02:47:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:18,647 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:47:18,647 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:47:18,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106135684] [2023-11-29 02:47:18,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106135684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:47:18,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:47:18,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:47:18,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418966578] [2023-11-29 02:47:18,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:47:18,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:47:18,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:47:18,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:47:18,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:47:18,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 108 [2023-11-29 02:47:18,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 128 transitions, 424 flow. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:18,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:47:18,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 108 [2023-11-29 02:47:18,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:47:19,761 INFO L124 PetriNetUnfolderBase]: 5359/8751 cut-off events. [2023-11-29 02:47:19,762 INFO L125 PetriNetUnfolderBase]: For 93/94 co-relation queries the response was YES. [2023-11-29 02:47:19,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16072 conditions, 8751 events. 5359/8751 cut-off events. For 93/94 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 68241 event pairs, 3814 based on Foata normal form. 68/4588 useless extension candidates. Maximal degree in co-relation 16058. Up to 7120 conditions per place. [2023-11-29 02:47:19,823 INFO L140 encePairwiseOnDemand]: 105/108 looper letters, 88 selfloop transitions, 1 changer transitions 0/126 dead transitions. [2023-11-29 02:47:19,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 126 transitions, 598 flow [2023-11-29 02:47:19,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:47:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:47:19,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2023-11-29 02:47:19,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141975308641975 [2023-11-29 02:47:19,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2023-11-29 02:47:19,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2023-11-29 02:47:19,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:47:19,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2023-11-29 02:47:19,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:19,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:19,828 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:19,828 INFO L175 Difference]: Start difference. First operand has 99 places, 128 transitions, 424 flow. Second operand 3 states and 199 transitions. [2023-11-29 02:47:19,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 126 transitions, 598 flow [2023-11-29 02:47:19,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 126 transitions, 597 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:47:19,832 INFO L231 Difference]: Finished difference. Result has 98 places, 126 transitions, 421 flow [2023-11-29 02:47:19,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=421, PETRI_PLACES=98, PETRI_TRANSITIONS=126} [2023-11-29 02:47:19,833 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 1 predicate places. [2023-11-29 02:47:19,833 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 126 transitions, 421 flow [2023-11-29 02:47:19,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:19,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:47:19,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:47:19,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-29 02:47:20,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:20,034 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:47:20,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:20,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1491512106, now seen corresponding path program 1 times [2023-11-29 02:47:20,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:47:20,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029247142] [2023-11-29 02:47:20,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:20,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:20,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:47:20,036 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:47:20,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-29 02:47:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:47:20,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:47:20,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:47:20,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 02:47:20,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,183 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:47:20,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-29 02:47:20,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:47:20,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,233 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:47:20,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 02:47:20,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,265 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:47:20,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 02:47:20,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-29 02:47:20,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,330 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:47:20,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-29 02:47:20,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-11-29 02:47:20,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:20,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 02:47:20,410 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 02:47:20,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 02:47:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:20,482 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:47:20,482 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:47:20,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029247142] [2023-11-29 02:47:20,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1029247142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:47:20,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:47:20,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:47:20,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586278307] [2023-11-29 02:47:20,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:47:20,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:47:20,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:47:20,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:47:20,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:47:20,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 108 [2023-11-29 02:47:20,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 126 transitions, 421 flow. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:20,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:47:20,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 108 [2023-11-29 02:47:20,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:47:21,529 INFO L124 PetriNetUnfolderBase]: 5359/8684 cut-off events. [2023-11-29 02:47:21,529 INFO L125 PetriNetUnfolderBase]: For 93/94 co-relation queries the response was YES. [2023-11-29 02:47:21,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16006 conditions, 8684 events. 5359/8684 cut-off events. For 93/94 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 67155 event pairs, 3814 based on Foata normal form. 68/4588 useless extension candidates. Maximal degree in co-relation 15991. Up to 7120 conditions per place. [2023-11-29 02:47:21,587 INFO L140 encePairwiseOnDemand]: 105/108 looper letters, 88 selfloop transitions, 1 changer transitions 0/124 dead transitions. [2023-11-29 02:47:21,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 124 transitions, 595 flow [2023-11-29 02:47:21,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:47:21,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:47:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2023-11-29 02:47:21,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141975308641975 [2023-11-29 02:47:21,589 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2023-11-29 02:47:21,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2023-11-29 02:47:21,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:47:21,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2023-11-29 02:47:21,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:21,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:21,591 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:21,591 INFO L175 Difference]: Start difference. First operand has 98 places, 126 transitions, 421 flow. Second operand 3 states and 199 transitions. [2023-11-29 02:47:21,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 124 transitions, 595 flow [2023-11-29 02:47:21,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 124 transitions, 594 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:47:21,594 INFO L231 Difference]: Finished difference. Result has 97 places, 124 transitions, 418 flow [2023-11-29 02:47:21,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=418, PETRI_PLACES=97, PETRI_TRANSITIONS=124} [2023-11-29 02:47:21,595 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 0 predicate places. [2023-11-29 02:47:21,595 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 124 transitions, 418 flow [2023-11-29 02:47:21,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:21,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:47:21,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:47:21,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-29 02:47:21,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:21,796 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:47:21,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:21,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1172730184, now seen corresponding path program 1 times [2023-11-29 02:47:21,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:47:21,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824449865] [2023-11-29 02:47:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:21,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:21,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:47:21,798 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:47:21,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-29 02:47:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:47:21,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:47:21,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:47:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:21,883 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:47:21,883 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:47:21,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824449865] [2023-11-29 02:47:21,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824449865] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:47:21,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:47:21,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:47:21,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964644283] [2023-11-29 02:47:21,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:47:21,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:47:21,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:47:21,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:47:21,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:47:21,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 108 [2023-11-29 02:47:21,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 124 transitions, 418 flow. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:21,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:47:21,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 108 [2023-11-29 02:47:21,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:47:23,243 INFO L124 PetriNetUnfolderBase]: 8853/13569 cut-off events. [2023-11-29 02:47:23,243 INFO L125 PetriNetUnfolderBase]: For 165/166 co-relation queries the response was YES. [2023-11-29 02:47:23,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25543 conditions, 13569 events. 8853/13569 cut-off events. For 165/166 co-relation queries the response was YES. Maximal size of possible extension queue 1071. Compared 100920 event pairs, 3038 based on Foata normal form. 289/7430 useless extension candidates. Maximal degree in co-relation 25527. Up to 7309 conditions per place. [2023-11-29 02:47:23,326 INFO L140 encePairwiseOnDemand]: 99/108 looper letters, 120 selfloop transitions, 3 changer transitions 0/158 dead transitions. [2023-11-29 02:47:23,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 158 transitions, 736 flow [2023-11-29 02:47:23,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:47:23,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:47:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2023-11-29 02:47:23,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2023-11-29 02:47:23,329 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2023-11-29 02:47:23,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2023-11-29 02:47:23,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:47:23,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2023-11-29 02:47:23,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:23,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:23,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:23,332 INFO L175 Difference]: Start difference. First operand has 97 places, 124 transitions, 418 flow. Second operand 3 states and 243 transitions. [2023-11-29 02:47:23,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 158 transitions, 736 flow [2023-11-29 02:47:23,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 158 transitions, 735 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:47:23,337 INFO L231 Difference]: Finished difference. Result has 99 places, 126 transitions, 446 flow [2023-11-29 02:47:23,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=446, PETRI_PLACES=99, PETRI_TRANSITIONS=126} [2023-11-29 02:47:23,338 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 2 predicate places. [2023-11-29 02:47:23,338 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 126 transitions, 446 flow [2023-11-29 02:47:23,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:23,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:47:23,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:47:23,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-29 02:47:23,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:23,540 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:47:23,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:23,540 INFO L85 PathProgramCache]: Analyzing trace with hash -2093394331, now seen corresponding path program 1 times [2023-11-29 02:47:23,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:47:23,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864779608] [2023-11-29 02:47:23,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:23,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:23,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:47:23,542 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:47:23,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-29 02:47:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:47:23,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:47:23,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:47:23,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:23,680 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 02:47:23,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-29 02:47:23,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:23,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:23,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:23,723 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:47:23,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-29 02:47:23,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:23,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:23,749 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:47:23,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-29 02:47:23,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:23,761 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:47:23,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 02:47:23,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:23,772 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:47:23,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 02:47:23,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:23,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:23,797 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:47:23,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-29 02:47:23,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:23,810 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:47:23,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 02:47:23,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:23,820 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:47:23,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 02:47:23,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:23,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:23,847 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:47:23,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 02:47:23,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:23,861 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:47:23,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 02:47:23,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:23,872 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:47:23,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 02:47:23,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:23,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:23,898 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:47:23,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 02:47:23,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:23,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 02:47:23,957 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 02:47:23,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 02:47:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:24,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:47:24,059 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:47:24,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864779608] [2023-11-29 02:47:24,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864779608] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:47:24,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:47:24,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:47:24,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974150738] [2023-11-29 02:47:24,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:47:24,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:47:24,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:47:24,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:47:24,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:47:24,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 108 [2023-11-29 02:47:24,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 126 transitions, 446 flow. Second operand has 4 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:24,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:47:24,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 108 [2023-11-29 02:47:24,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:47:25,720 INFO L124 PetriNetUnfolderBase]: 8763/13749 cut-off events. [2023-11-29 02:47:25,720 INFO L125 PetriNetUnfolderBase]: For 1010/1020 co-relation queries the response was YES. [2023-11-29 02:47:25,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27592 conditions, 13749 events. 8763/13749 cut-off events. For 1010/1020 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 106871 event pairs, 6382 based on Foata normal form. 174/8035 useless extension candidates. Maximal degree in co-relation 27574. Up to 11711 conditions per place. [2023-11-29 02:47:25,787 INFO L140 encePairwiseOnDemand]: 105/108 looper letters, 90 selfloop transitions, 1 changer transitions 0/124 dead transitions. [2023-11-29 02:47:25,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 124 transitions, 624 flow [2023-11-29 02:47:25,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:47:25,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:47:25,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2023-11-29 02:47:25,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141975308641975 [2023-11-29 02:47:25,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2023-11-29 02:47:25,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2023-11-29 02:47:25,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:47:25,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2023-11-29 02:47:25,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:25,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:25,791 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:25,791 INFO L175 Difference]: Start difference. First operand has 99 places, 126 transitions, 446 flow. Second operand 3 states and 199 transitions. [2023-11-29 02:47:25,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 124 transitions, 624 flow [2023-11-29 02:47:25,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 124 transitions, 621 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:47:25,799 INFO L231 Difference]: Finished difference. Result has 98 places, 124 transitions, 441 flow [2023-11-29 02:47:25,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=441, PETRI_PLACES=98, PETRI_TRANSITIONS=124} [2023-11-29 02:47:25,800 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 1 predicate places. [2023-11-29 02:47:25,800 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 124 transitions, 441 flow [2023-11-29 02:47:25,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:25,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:47:25,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:47:25,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-29 02:47:26,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:26,001 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:47:26,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:26,002 INFO L85 PathProgramCache]: Analyzing trace with hash -2093394330, now seen corresponding path program 1 times [2023-11-29 02:47:26,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:47:26,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650961442] [2023-11-29 02:47:26,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:26,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:26,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:47:26,003 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:47:26,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-29 02:47:26,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:47:26,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:47:26,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:47:26,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:26,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 02:47:26,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 02:47:26,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:26,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:26,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:47:26,178 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:47:26,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:26,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:26,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:47:26,196 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:47:26,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:26,201 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:47:26,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:26,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:26,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:47:26,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:26,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:26,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:47:26,240 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:47:26,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:26,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:26,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:47:26,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:26,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:26,280 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:47:26,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:26,289 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:47:26,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:26,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 02:47:26,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:26,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 02:47:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:26,462 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:47:26,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:47:26,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650961442] [2023-11-29 02:47:26,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650961442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:47:26,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:47:26,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:47:26,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522276293] [2023-11-29 02:47:26,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:47:26,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:47:26,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:47:26,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:47:26,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:47:26,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 108 [2023-11-29 02:47:26,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 124 transitions, 441 flow. Second operand has 5 states, 5 states have (on average 49.8) internal successors, (249), 5 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:26,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:47:26,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 108 [2023-11-29 02:47:26,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:47:28,084 INFO L124 PetriNetUnfolderBase]: 8763/13623 cut-off events. [2023-11-29 02:47:28,084 INFO L125 PetriNetUnfolderBase]: For 1010/1020 co-relation queries the response was YES. [2023-11-29 02:47:28,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27178 conditions, 13623 events. 8763/13623 cut-off events. For 1010/1020 co-relation queries the response was YES. Maximal size of possible extension queue 1092. Compared 104747 event pairs, 6382 based on Foata normal form. 174/8035 useless extension candidates. Maximal degree in co-relation 27159. Up to 11711 conditions per place. [2023-11-29 02:47:28,163 INFO L140 encePairwiseOnDemand]: 105/108 looper letters, 90 selfloop transitions, 1 changer transitions 0/122 dead transitions. [2023-11-29 02:47:28,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 122 transitions, 619 flow [2023-11-29 02:47:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:47:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:47:28,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2023-11-29 02:47:28,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141975308641975 [2023-11-29 02:47:28,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2023-11-29 02:47:28,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2023-11-29 02:47:28,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:47:28,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2023-11-29 02:47:28,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:28,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:28,167 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:28,167 INFO L175 Difference]: Start difference. First operand has 98 places, 124 transitions, 441 flow. Second operand 3 states and 199 transitions. [2023-11-29 02:47:28,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 122 transitions, 619 flow [2023-11-29 02:47:28,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 122 transitions, 618 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:47:28,173 INFO L231 Difference]: Finished difference. Result has 97 places, 122 transitions, 438 flow [2023-11-29 02:47:28,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=438, PETRI_PLACES=97, PETRI_TRANSITIONS=122} [2023-11-29 02:47:28,174 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 0 predicate places. [2023-11-29 02:47:28,174 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 122 transitions, 438 flow [2023-11-29 02:47:28,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.8) internal successors, (249), 5 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:28,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:47:28,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:47:28,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-11-29 02:47:28,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:28,375 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:47:28,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:28,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1994895219, now seen corresponding path program 1 times [2023-11-29 02:47:28,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:47:28,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388867914] [2023-11-29 02:47:28,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:28,376 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:28,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:47:28,377 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:47:28,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-29 02:47:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:47:28,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:47:28,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:47:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:28,460 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:47:28,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:47:28,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388867914] [2023-11-29 02:47:28,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388867914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:47:28,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:47:28,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:47:28,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700217483] [2023-11-29 02:47:28,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:47:28,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:47:28,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:47:28,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:47:28,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:47:28,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 108 [2023-11-29 02:47:28,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 122 transitions, 438 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:28,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:47:28,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 108 [2023-11-29 02:47:28,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:47:30,038 INFO L124 PetriNetUnfolderBase]: 11027/16807 cut-off events. [2023-11-29 02:47:30,038 INFO L125 PetriNetUnfolderBase]: For 1068/1091 co-relation queries the response was YES. [2023-11-29 02:47:30,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33732 conditions, 16807 events. 11027/16807 cut-off events. For 1068/1091 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 120899 event pairs, 3818 based on Foata normal form. 0/10759 useless extension candidates. Maximal degree in co-relation 33712. Up to 7936 conditions per place. [2023-11-29 02:47:30,131 INFO L140 encePairwiseOnDemand]: 103/108 looper letters, 121 selfloop transitions, 4 changer transitions 0/151 dead transitions. [2023-11-29 02:47:30,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 151 transitions, 754 flow [2023-11-29 02:47:30,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:47:30,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:47:30,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 223 transitions. [2023-11-29 02:47:30,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6882716049382716 [2023-11-29 02:47:30,133 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 223 transitions. [2023-11-29 02:47:30,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 223 transitions. [2023-11-29 02:47:30,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:47:30,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 223 transitions. [2023-11-29 02:47:30,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:30,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:30,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:30,136 INFO L175 Difference]: Start difference. First operand has 97 places, 122 transitions, 438 flow. Second operand 3 states and 223 transitions. [2023-11-29 02:47:30,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 151 transitions, 754 flow [2023-11-29 02:47:30,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 151 transitions, 753 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:47:30,141 INFO L231 Difference]: Finished difference. Result has 100 places, 123 transitions, 459 flow [2023-11-29 02:47:30,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=459, PETRI_PLACES=100, PETRI_TRANSITIONS=123} [2023-11-29 02:47:30,142 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 3 predicate places. [2023-11-29 02:47:30,142 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 123 transitions, 459 flow [2023-11-29 02:47:30,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:30,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:47:30,142 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-29 02:47:30,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-29 02:47:30,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:30,343 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:47:30,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:30,343 INFO L85 PathProgramCache]: Analyzing trace with hash 24781265, now seen corresponding path program 2 times [2023-11-29 02:47:30,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:47:30,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997324401] [2023-11-29 02:47:30,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:47:30,343 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:47:30,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:47:30,344 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:47:30,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-29 02:47:30,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:47:30,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:47:30,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:47:30,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:47:30,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 02:47:30,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:47:30,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:47:30,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:30,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:30,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:47:30,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:30,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:47:30,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:30,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:47:30,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:30,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:47:30,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:30,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:47:30,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:47:30,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:30,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:30,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:47:30,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:47:30,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 02:47:30,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:30,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:47:30,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:47:30,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:47:30,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:47:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:30,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:47:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:31,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:47:31,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997324401] [2023-11-29 02:47:31,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997324401] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:47:31,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:47:31,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 02:47:31,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180837036] [2023-11-29 02:47:31,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:47:31,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:47:31,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:47:31,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:47:31,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:47:34,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 108 [2023-11-29 02:47:34,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 123 transitions, 459 flow. Second operand has 14 states, 14 states have (on average 48.57142857142857) internal successors, (680), 14 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:34,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:47:34,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 108 [2023-11-29 02:47:34,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:47:38,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:47:42,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:47:45,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:47:48,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:47:51,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:47:53,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:47:54,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:47:58,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:48:02,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:48:04,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:48:07,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:48:09,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:48:13,858 INFO L124 PetriNetUnfolderBase]: 9001/14491 cut-off events. [2023-11-29 02:48:13,858 INFO L125 PetriNetUnfolderBase]: For 2827/2988 co-relation queries the response was YES. [2023-11-29 02:48:13,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30145 conditions, 14491 events. 9001/14491 cut-off events. For 2827/2988 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 109837 event pairs, 6389 based on Foata normal form. 17/9235 useless extension candidates. Maximal degree in co-relation 30122. Up to 11896 conditions per place. [2023-11-29 02:48:13,958 INFO L140 encePairwiseOnDemand]: 95/108 looper letters, 59 selfloop transitions, 90 changer transitions 0/178 dead transitions. [2023-11-29 02:48:13,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 178 transitions, 1031 flow [2023-11-29 02:48:13,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 02:48:13,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 02:48:13,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1433 transitions. [2023-11-29 02:48:13,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142661179698216 [2023-11-29 02:48:13,965 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1433 transitions. [2023-11-29 02:48:13,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1433 transitions. [2023-11-29 02:48:13,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:48:13,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1433 transitions. [2023-11-29 02:48:13,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 53.074074074074076) internal successors, (1433), 27 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:13,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 108.0) internal successors, (3024), 28 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:13,975 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 108.0) internal successors, (3024), 28 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:13,975 INFO L175 Difference]: Start difference. First operand has 100 places, 123 transitions, 459 flow. Second operand 27 states and 1433 transitions. [2023-11-29 02:48:13,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 178 transitions, 1031 flow [2023-11-29 02:48:13,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 178 transitions, 1023 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:48:13,983 INFO L231 Difference]: Finished difference. Result has 132 places, 177 transitions, 979 flow [2023-11-29 02:48:13,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=979, PETRI_PLACES=132, PETRI_TRANSITIONS=177} [2023-11-29 02:48:13,983 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 35 predicate places. [2023-11-29 02:48:13,983 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 177 transitions, 979 flow [2023-11-29 02:48:13,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 48.57142857142857) internal successors, (680), 14 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:13,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:48:13,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:13,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-29 02:48:14,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:48:14,185 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:48:14,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:14,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1704474478, now seen corresponding path program 1 times [2023-11-29 02:48:14,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:48:14,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555506753] [2023-11-29 02:48:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:14,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:48:14,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:48:14,186 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:48:14,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-29 02:48:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:14,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:48:14,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:48:14,294 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:48:14,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:48:14,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555506753] [2023-11-29 02:48:14,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555506753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:14,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:48:14,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:48:14,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481098870] [2023-11-29 02:48:14,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:14,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:48:14,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:48:14,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:48:14,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:48:14,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 108 [2023-11-29 02:48:14,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 177 transitions, 979 flow. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:14,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:48:14,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 108 [2023-11-29 02:48:14,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:48:16,755 INFO L124 PetriNetUnfolderBase]: 13465/21333 cut-off events. [2023-11-29 02:48:16,756 INFO L125 PetriNetUnfolderBase]: For 2788/2913 co-relation queries the response was YES. [2023-11-29 02:48:16,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44087 conditions, 21333 events. 13465/21333 cut-off events. For 2788/2913 co-relation queries the response was YES. Maximal size of possible extension queue 956. Compared 161670 event pairs, 5277 based on Foata normal form. 376/13995 useless extension candidates. Maximal degree in co-relation 44056. Up to 9331 conditions per place. [2023-11-29 02:48:16,913 INFO L140 encePairwiseOnDemand]: 103/108 looper letters, 180 selfloop transitions, 2 changer transitions 0/214 dead transitions. [2023-11-29 02:48:16,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 214 transitions, 1441 flow [2023-11-29 02:48:16,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:48:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:48:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2023-11-29 02:48:16,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2023-11-29 02:48:16,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2023-11-29 02:48:16,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2023-11-29 02:48:16,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:48:16,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2023-11-29 02:48:16,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:16,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:16,917 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:16,917 INFO L175 Difference]: Start difference. First operand has 132 places, 177 transitions, 979 flow. Second operand 3 states and 243 transitions. [2023-11-29 02:48:16,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 214 transitions, 1441 flow [2023-11-29 02:48:16,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 214 transitions, 1211 flow, removed 66 selfloop flow, removed 9 redundant places. [2023-11-29 02:48:16,928 INFO L231 Difference]: Finished difference. Result has 126 places, 178 transitions, 765 flow [2023-11-29 02:48:16,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=765, PETRI_PLACES=126, PETRI_TRANSITIONS=178} [2023-11-29 02:48:16,929 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 29 predicate places. [2023-11-29 02:48:16,929 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 178 transitions, 765 flow [2023-11-29 02:48:16,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:16,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:48:16,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:16,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-29 02:48:17,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:48:17,130 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:48:17,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:17,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1299099092, now seen corresponding path program 1 times [2023-11-29 02:48:17,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:48:17,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032980735] [2023-11-29 02:48:17,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:17,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:48:17,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:48:17,132 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:48:17,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-29 02:48:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:17,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:48:17,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:48:17,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:48:17,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:48:17,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032980735] [2023-11-29 02:48:17,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032980735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:17,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:48:17,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:48:17,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587559556] [2023-11-29 02:48:17,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:17,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:48:17,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:48:17,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:48:17,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:48:17,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 108 [2023-11-29 02:48:17,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 178 transitions, 765 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:17,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:48:17,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 108 [2023-11-29 02:48:17,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:48:19,941 INFO L124 PetriNetUnfolderBase]: 16474/24987 cut-off events. [2023-11-29 02:48:19,941 INFO L125 PetriNetUnfolderBase]: For 3580/3902 co-relation queries the response was YES. [2023-11-29 02:48:20,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52656 conditions, 24987 events. 16474/24987 cut-off events. For 3580/3902 co-relation queries the response was YES. Maximal size of possible extension queue 1190. Compared 182019 event pairs, 7833 based on Foata normal form. 0/16459 useless extension candidates. Maximal degree in co-relation 52624. Up to 13805 conditions per place. [2023-11-29 02:48:20,124 INFO L140 encePairwiseOnDemand]: 103/108 looper letters, 177 selfloop transitions, 4 changer transitions 0/210 dead transitions. [2023-11-29 02:48:20,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 210 transitions, 1212 flow [2023-11-29 02:48:20,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:48:20,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:48:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2023-11-29 02:48:20,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7129629629629629 [2023-11-29 02:48:20,126 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2023-11-29 02:48:20,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2023-11-29 02:48:20,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:48:20,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2023-11-29 02:48:20,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:20,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:20,128 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:20,128 INFO L175 Difference]: Start difference. First operand has 126 places, 178 transitions, 765 flow. Second operand 3 states and 231 transitions. [2023-11-29 02:48:20,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 210 transitions, 1212 flow [2023-11-29 02:48:20,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 210 transitions, 1210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:48:20,136 INFO L231 Difference]: Finished difference. Result has 129 places, 178 transitions, 781 flow [2023-11-29 02:48:20,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=781, PETRI_PLACES=129, PETRI_TRANSITIONS=178} [2023-11-29 02:48:20,137 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 32 predicate places. [2023-11-29 02:48:20,137 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 178 transitions, 781 flow [2023-11-29 02:48:20,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:20,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:48:20,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:20,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-11-29 02:48:20,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:48:20,338 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:48:20,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:20,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1151387381, now seen corresponding path program 1 times [2023-11-29 02:48:20,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:48:20,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881166231] [2023-11-29 02:48:20,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:20,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:48:20,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:48:20,339 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:48:20,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-29 02:48:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:20,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:48:20,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:48:20,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:48:20,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:48:20,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881166231] [2023-11-29 02:48:20,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881166231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:20,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:48:20,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:48:20,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928203100] [2023-11-29 02:48:20,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:20,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:48:20,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:48:20,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:48:20,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:48:20,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 108 [2023-11-29 02:48:20,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 178 transitions, 781 flow. Second operand has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:20,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:48:20,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 108 [2023-11-29 02:48:20,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:48:23,369 INFO L124 PetriNetUnfolderBase]: 14307/22582 cut-off events. [2023-11-29 02:48:23,369 INFO L125 PetriNetUnfolderBase]: For 7703/8282 co-relation queries the response was YES. [2023-11-29 02:48:23,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49733 conditions, 22582 events. 14307/22582 cut-off events. For 7703/8282 co-relation queries the response was YES. Maximal size of possible extension queue 1102. Compared 167582 event pairs, 10595 based on Foata normal form. 42/15127 useless extension candidates. Maximal degree in co-relation 49698. Up to 18114 conditions per place. [2023-11-29 02:48:23,540 INFO L140 encePairwiseOnDemand]: 102/108 looper letters, 230 selfloop transitions, 3 changer transitions 0/266 dead transitions. [2023-11-29 02:48:23,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 266 transitions, 1618 flow [2023-11-29 02:48:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:48:23,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:48:23,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2023-11-29 02:48:23,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6643518518518519 [2023-11-29 02:48:23,543 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 287 transitions. [2023-11-29 02:48:23,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 287 transitions. [2023-11-29 02:48:23,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:48:23,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 287 transitions. [2023-11-29 02:48:23,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:23,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:23,545 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:23,545 INFO L175 Difference]: Start difference. First operand has 129 places, 178 transitions, 781 flow. Second operand 4 states and 287 transitions. [2023-11-29 02:48:23,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 266 transitions, 1618 flow [2023-11-29 02:48:23,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 266 transitions, 1610 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:48:23,558 INFO L231 Difference]: Finished difference. Result has 131 places, 178 transitions, 786 flow [2023-11-29 02:48:23,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=786, PETRI_PLACES=131, PETRI_TRANSITIONS=178} [2023-11-29 02:48:23,559 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 34 predicate places. [2023-11-29 02:48:23,559 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 178 transitions, 786 flow [2023-11-29 02:48:23,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:23,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:48:23,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:23,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-11-29 02:48:23,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:48:23,760 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:48:23,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:23,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1333272632, now seen corresponding path program 1 times [2023-11-29 02:48:23,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:48:23,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160351374] [2023-11-29 02:48:23,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:23,761 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:48:23,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:48:23,762 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:48:23,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-29 02:48:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:23,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:48:23,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:48:23,887 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:48:23,887 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:48:23,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160351374] [2023-11-29 02:48:23,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160351374] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:23,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:48:23,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:48:23,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912772278] [2023-11-29 02:48:23,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:23,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:48:23,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:48:23,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:48:23,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:48:23,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 108 [2023-11-29 02:48:23,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 178 transitions, 786 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:23,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:48:23,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 108 [2023-11-29 02:48:23,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:48:28,402 INFO L124 PetriNetUnfolderBase]: 25070/37681 cut-off events. [2023-11-29 02:48:28,403 INFO L125 PetriNetUnfolderBase]: For 10206/11176 co-relation queries the response was YES. [2023-11-29 02:48:28,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84126 conditions, 37681 events. 25070/37681 cut-off events. For 10206/11176 co-relation queries the response was YES. Maximal size of possible extension queue 1775. Compared 278285 event pairs, 14199 based on Foata normal form. 0/24851 useless extension candidates. Maximal degree in co-relation 84090. Up to 16548 conditions per place. [2023-11-29 02:48:28,672 INFO L140 encePairwiseOnDemand]: 103/108 looper letters, 177 selfloop transitions, 5 changer transitions 0/212 dead transitions. [2023-11-29 02:48:28,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 212 transitions, 1253 flow [2023-11-29 02:48:28,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:48:28,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:48:28,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2023-11-29 02:48:28,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7129629629629629 [2023-11-29 02:48:28,675 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2023-11-29 02:48:28,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2023-11-29 02:48:28,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:48:28,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2023-11-29 02:48:28,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:28,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:28,677 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:28,677 INFO L175 Difference]: Start difference. First operand has 131 places, 178 transitions, 786 flow. Second operand 3 states and 231 transitions. [2023-11-29 02:48:28,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 212 transitions, 1253 flow [2023-11-29 02:48:28,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 212 transitions, 1249 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 02:48:28,694 INFO L231 Difference]: Finished difference. Result has 134 places, 179 transitions, 808 flow [2023-11-29 02:48:28,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=808, PETRI_PLACES=134, PETRI_TRANSITIONS=179} [2023-11-29 02:48:28,695 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 37 predicate places. [2023-11-29 02:48:28,695 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 179 transitions, 808 flow [2023-11-29 02:48:28,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:28,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:48:28,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:28,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-11-29 02:48:28,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:48:28,896 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:48:28,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:28,896 INFO L85 PathProgramCache]: Analyzing trace with hash -379313555, now seen corresponding path program 1 times [2023-11-29 02:48:28,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:48:28,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608905605] [2023-11-29 02:48:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:28,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:48:28,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:48:28,897 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:48:28,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-29 02:48:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:29,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 02:48:29,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:29,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:48:29,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:48:29,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:48:29,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:48:29,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:48:29,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:48:29,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:48:29,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:48:29,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:48:29,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:48:29,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:48:29,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:48:29,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:48:29,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:48:29,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:48:29,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 02:48:29,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:48:29,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:48:29,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:48:29,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:48:29,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:48:29,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:48:29,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:48:29,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:29,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:48:29,265 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-29 02:48:29,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-29 02:48:29,281 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 02:48:29,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 02:48:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:48:29,310 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:48:29,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:48:29,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608905605] [2023-11-29 02:48:29,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608905605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:29,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:48:29,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:48:29,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506943564] [2023-11-29 02:48:29,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:29,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:48:29,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:48:29,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:48:29,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:48:29,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 108 [2023-11-29 02:48:29,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 179 transitions, 808 flow. Second operand has 4 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:29,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:48:29,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 108 [2023-11-29 02:48:29,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:48:32,278 INFO L124 PetriNetUnfolderBase]: 15165/24517 cut-off events. [2023-11-29 02:48:32,278 INFO L125 PetriNetUnfolderBase]: For 11122/12279 co-relation queries the response was YES. [2023-11-29 02:48:32,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55003 conditions, 24517 events. 15165/24517 cut-off events. For 11122/12279 co-relation queries the response was YES. Maximal size of possible extension queue 1071. Compared 190106 event pairs, 11639 based on Foata normal form. 0/17591 useless extension candidates. Maximal degree in co-relation 54964. Up to 19972 conditions per place. [2023-11-29 02:48:32,480 INFO L140 encePairwiseOnDemand]: 101/108 looper letters, 118 selfloop transitions, 23 changer transitions 0/175 dead transitions. [2023-11-29 02:48:32,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 175 transitions, 1076 flow [2023-11-29 02:48:32,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:48:32,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:48:32,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 288 transitions. [2023-11-29 02:48:32,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-11-29 02:48:32,482 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 288 transitions. [2023-11-29 02:48:32,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 288 transitions. [2023-11-29 02:48:32,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:48:32,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 288 transitions. [2023-11-29 02:48:32,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 57.6) internal successors, (288), 5 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:32,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 108.0) internal successors, (648), 6 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:32,485 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 108.0) internal successors, (648), 6 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:32,485 INFO L175 Difference]: Start difference. First operand has 134 places, 179 transitions, 808 flow. Second operand 5 states and 288 transitions. [2023-11-29 02:48:32,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 175 transitions, 1076 flow [2023-11-29 02:48:32,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 175 transitions, 1066 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:48:32,496 INFO L231 Difference]: Finished difference. Result has 132 places, 175 transitions, 830 flow [2023-11-29 02:48:32,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=830, PETRI_PLACES=132, PETRI_TRANSITIONS=175} [2023-11-29 02:48:32,497 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 35 predicate places. [2023-11-29 02:48:32,497 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 175 transitions, 830 flow [2023-11-29 02:48:32,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:32,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:48:32,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:32,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-11-29 02:48:32,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:48:32,697 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:48:32,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:32,698 INFO L85 PathProgramCache]: Analyzing trace with hash -379313554, now seen corresponding path program 1 times [2023-11-29 02:48:32,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:48:32,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811290819] [2023-11-29 02:48:32,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:32,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:48:32,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:48:32,699 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:48:32,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-29 02:48:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:32,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 02:48:32,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:32,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 02:48:32,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 02:48:32,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:32,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:48:32,907 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 [2023-11-29 02:48:32,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:32,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:48:32,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:32,926 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 13 treesize of output 1 [2023-11-29 02:48:32,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:32,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:48:32,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:32,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:48:32,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 02:48:32,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:32,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:48:32,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:32,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:48:33,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 02:48:33,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:33,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:48:33,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:33,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:48:33,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:33,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:48:33,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:33,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:48:33,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:33,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:48:33,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:33,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 02:48:33,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:33,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:48:33,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:33,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:48:33,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:33,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:48:33,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:33,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:48:33,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 02:48:33,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:33,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:48:33,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:33,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:48:33,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 02:48:33,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:33,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:48:33,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:33,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:48:33,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:33,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:48:33,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:48:33,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:48:33,455 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-29 02:48:33,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-29 02:48:33,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 02:48:33,522 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 02:48:33,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-29 02:48:33,544 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 02:48:33,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 02:48:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:48:33,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:48:40,481 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:48:40,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811290819] [2023-11-29 02:48:40,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811290819] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:40,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:48:40,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2023-11-29 02:48:40,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550242291] [2023-11-29 02:48:40,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:40,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:48:40,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:48:40,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:48:40,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:48:44,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:48:48,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:48:52,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:48:54,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:48:56,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:49:02,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:49:06,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:49:11,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:49:17,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:49:19,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:49:23,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:49:27,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:49:32,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:49:32,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 108 [2023-11-29 02:49:32,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 175 transitions, 830 flow. Second operand has 13 states, 13 states have (on average 34.46153846153846) internal successors, (448), 13 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:49:32,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:32,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 108 [2023-11-29 02:49:32,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:34,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:49:40,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:49:44,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:49:51,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:49:58,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:50:05,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:50:20,660 INFO L124 PetriNetUnfolderBase]: 37436/61110 cut-off events. [2023-11-29 02:50:20,660 INFO L125 PetriNetUnfolderBase]: For 22076/25132 co-relation queries the response was YES. [2023-11-29 02:50:20,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133042 conditions, 61110 events. 37436/61110 cut-off events. For 22076/25132 co-relation queries the response was YES. Maximal size of possible extension queue 2286. Compared 534251 event pairs, 28293 based on Foata normal form. 1990/45585 useless extension candidates. Maximal degree in co-relation 133003. Up to 19562 conditions per place. [2023-11-29 02:50:21,165 INFO L140 encePairwiseOnDemand]: 94/108 looper letters, 190 selfloop transitions, 210 changer transitions 0/428 dead transitions. [2023-11-29 02:50:21,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 428 transitions, 2844 flow [2023-11-29 02:50:21,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 02:50:21,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 02:50:21,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 727 transitions. [2023-11-29 02:50:21,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3959694989106754 [2023-11-29 02:50:21,171 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 727 transitions. [2023-11-29 02:50:21,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 727 transitions. [2023-11-29 02:50:21,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:50:21,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 727 transitions. [2023-11-29 02:50:21,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 42.76470588235294) internal successors, (727), 17 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:50:21,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 108.0) internal successors, (1944), 18 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:50:21,177 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 108.0) internal successors, (1944), 18 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:50:21,177 INFO L175 Difference]: Start difference. First operand has 132 places, 175 transitions, 830 flow. Second operand 17 states and 727 transitions. [2023-11-29 02:50:21,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 428 transitions, 2844 flow [2023-11-29 02:50:21,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 428 transitions, 2787 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 02:50:21,199 INFO L231 Difference]: Finished difference. Result has 152 places, 320 transitions, 2251 flow [2023-11-29 02:50:21,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2251, PETRI_PLACES=152, PETRI_TRANSITIONS=320} [2023-11-29 02:50:21,199 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 55 predicate places. [2023-11-29 02:50:21,199 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 320 transitions, 2251 flow [2023-11-29 02:50:21,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 34.46153846153846) internal successors, (448), 13 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:50:21,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:50:21,200 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1] [2023-11-29 02:50:21,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-11-29 02:50:21,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:50:21,400 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:50:21,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:21,401 INFO L85 PathProgramCache]: Analyzing trace with hash -442251758, now seen corresponding path program 1 times [2023-11-29 02:50:21,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:50:21,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195408777] [2023-11-29 02:50:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:21,401 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 [2023-11-29 02:50:21,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:50:21,402 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:50:21,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-29 02:50:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:21,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 02:50:21,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:50:21,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 02:50:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:50:22,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:50:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:50:24,983 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:50:24,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195408777] [2023-11-29 02:50:24,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195408777] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:50:24,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:50:24,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2023-11-29 02:50:24,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003586552] [2023-11-29 02:50:24,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:50:24,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 02:50:24,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:50:24,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 02:50:24,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2023-11-29 02:50:35,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 108 [2023-11-29 02:50:35,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 320 transitions, 2251 flow. Second operand has 22 states, 22 states have (on average 48.77272727272727) internal successors, (1073), 22 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:50:35,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:50:35,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 108 [2023-11-29 02:50:35,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:50:48,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:50:50,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:50:54,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:50:57,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:51:00,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:51:04,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:51:08,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:51:12,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:51:18,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:51:22,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:51:26,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:51:32,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:51:37,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:51:41,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:51:45,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:51:49,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:51:53,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:51:56,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:52:00,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:52:03,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:52:08,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:52:11,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:52:16,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:52:19,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:52:22,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.93s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:52:27,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:52:29,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:52:32,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:52:37,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:52:41,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:52:44,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:52:53,593 INFO L124 PetriNetUnfolderBase]: 37385/61138 cut-off events. [2023-11-29 02:52:53,593 INFO L125 PetriNetUnfolderBase]: For 30484/33535 co-relation queries the response was YES. [2023-11-29 02:52:53,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137524 conditions, 61138 events. 37385/61138 cut-off events. For 30484/33535 co-relation queries the response was YES. Maximal size of possible extension queue 2296. Compared 536781 event pairs, 28185 based on Foata normal form. 60/43829 useless extension candidates. Maximal degree in co-relation 137478. Up to 48937 conditions per place. [2023-11-29 02:52:54,154 INFO L140 encePairwiseOnDemand]: 95/108 looper letters, 86 selfloop transitions, 368 changer transitions 0/485 dead transitions. [2023-11-29 02:52:54,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 485 transitions, 4562 flow [2023-11-29 02:52:54,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-29 02:52:54,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-11-29 02:52:54,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2714 transitions. [2023-11-29 02:52:54,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47414395527603076 [2023-11-29 02:52:54,164 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2714 transitions. [2023-11-29 02:52:54,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2714 transitions. [2023-11-29 02:52:54,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:52:54,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2714 transitions. [2023-11-29 02:52:54,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 51.20754716981132) internal successors, (2714), 53 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:52:54,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 108.0) internal successors, (5832), 54 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:52:54,188 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 108.0) internal successors, (5832), 54 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:52:54,188 INFO L175 Difference]: Start difference. First operand has 152 places, 320 transitions, 2251 flow. Second operand 53 states and 2714 transitions. [2023-11-29 02:52:54,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 485 transitions, 4562 flow [2023-11-29 02:52:54,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 485 transitions, 4549 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-29 02:52:54,300 INFO L231 Difference]: Finished difference. Result has 223 places, 465 transitions, 4379 flow [2023-11-29 02:52:54,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=2238, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=4379, PETRI_PLACES=223, PETRI_TRANSITIONS=465} [2023-11-29 02:52:54,301 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 126 predicate places. [2023-11-29 02:52:54,301 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 465 transitions, 4379 flow [2023-11-29 02:52:54,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 48.77272727272727) internal successors, (1073), 22 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:52:54,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:52:54,302 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:52:54,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-11-29 02:52:54,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:52:54,503 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:52:54,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:52:54,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1461619641, now seen corresponding path program 1 times [2023-11-29 02:52:54,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:52:54,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777893072] [2023-11-29 02:52:54,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:54,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:52:54,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:52:54,504 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:52:54,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-29 02:52:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:52:54,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:52:54,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:52:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:52:54,687 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:52:54,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:52:54,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777893072] [2023-11-29 02:52:54,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777893072] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:52:54,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:52:54,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:52:54,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089277310] [2023-11-29 02:52:54,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:52:54,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:52:54,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:52:54,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:52:54,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:52:54,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 108 [2023-11-29 02:52:54,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 465 transitions, 4379 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:52:54,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:52:54,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 108 [2023-11-29 02:52:54,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:53:08,304 INFO L124 PetriNetUnfolderBase]: 49595/78903 cut-off events. [2023-11-29 02:53:08,304 INFO L125 PetriNetUnfolderBase]: For 47766/53070 co-relation queries the response was YES. [2023-11-29 02:53:08,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184491 conditions, 78903 events. 49595/78903 cut-off events. For 47766/53070 co-relation queries the response was YES. Maximal size of possible extension queue 2552. Compared 669852 event pairs, 16087 based on Foata normal form. 1678/60678 useless extension candidates. Maximal degree in co-relation 184424. Up to 48311 conditions per place. [2023-11-29 02:53:09,252 INFO L140 encePairwiseOnDemand]: 103/108 looper letters, 461 selfloop transitions, 2 changer transitions 0/497 dead transitions. [2023-11-29 02:53:09,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 497 transitions, 5422 flow [2023-11-29 02:53:09,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:53:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:53:09,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2023-11-29 02:53:09,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7191358024691358 [2023-11-29 02:53:09,254 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2023-11-29 02:53:09,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2023-11-29 02:53:09,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:53:09,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2023-11-29 02:53:09,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:53:09,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:53:09,255 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:53:09,255 INFO L175 Difference]: Start difference. First operand has 223 places, 465 transitions, 4379 flow. Second operand 3 states and 233 transitions. [2023-11-29 02:53:09,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 497 transitions, 5422 flow [2023-11-29 02:53:09,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 497 transitions, 4742 flow, removed 138 selfloop flow, removed 18 redundant places. [2023-11-29 02:53:09,415 INFO L231 Difference]: Finished difference. Result has 208 places, 466 transitions, 3717 flow [2023-11-29 02:53:09,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=3699, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3717, PETRI_PLACES=208, PETRI_TRANSITIONS=466} [2023-11-29 02:53:09,416 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 111 predicate places. [2023-11-29 02:53:09,416 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 466 transitions, 3717 flow [2023-11-29 02:53:09,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:53:09,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:53:09,416 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:53:09,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-11-29 02:53:09,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:53:09,617 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:53:09,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:53:09,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1752580310, now seen corresponding path program 2 times [2023-11-29 02:53:09,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:53:09,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936841732] [2023-11-29 02:53:09,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:53:09,618 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:53:09,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:53:09,618 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:53:09,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-29 02:53:09,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 02:53:09,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:53:09,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 02:53:09,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:53:09,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 02:53:09,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:53:09,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 02:53:09,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:09,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:53:09,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:09,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:53:09,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 02:53:09,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:09,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:53:09,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:09,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:53:09,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:09,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:53:09,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:09,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:53:09,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 02:53:09,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:09,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:53:09,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:09,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:53:09,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 02:53:10,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:10,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:53:10,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:10,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:53:10,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:10,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:53:10,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:10,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:53:10,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 02:53:10,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:10,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:53:10,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:10,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:53:10,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 02:53:10,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:10,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:53:10,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:10,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:53:10,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:10,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:53:10,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:10,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 02:53:10,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:10,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:53:10,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:10,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:53:10,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:10,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:53:10,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:10,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:53:10,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:53:10,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:53:10,718 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-11-29 02:53:10,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-11-29 02:53:10,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 02:53:10,821 INFO L349 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-11-29 02:53:10,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-11-29 02:53:10,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 02:53:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 02:53:11,058 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:53:11,059 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:53:11,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936841732] [2023-11-29 02:53:11,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936841732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:53:11,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:53:11,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:53:11,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935062036] [2023-11-29 02:53:11,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:53:11,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:53:11,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:53:11,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:53:11,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:53:11,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 108 [2023-11-29 02:53:11,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 466 transitions, 3717 flow. Second operand has 6 states, 6 states have (on average 49.166666666666664) internal successors, (295), 6 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:53:11,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:53:11,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 108 [2023-11-29 02:53:11,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:53:24,224 INFO L124 PetriNetUnfolderBase]: 43521/68485 cut-off events. [2023-11-29 02:53:24,224 INFO L125 PetriNetUnfolderBase]: For 48347/53337 co-relation queries the response was YES. [2023-11-29 02:53:24,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160578 conditions, 68485 events. 43521/68485 cut-off events. For 48347/53337 co-relation queries the response was YES. Maximal size of possible extension queue 2242. Compared 563735 event pairs, 32031 based on Foata normal form. 2071/52189 useless extension candidates. Maximal degree in co-relation 160509. Up to 57577 conditions per place. [2023-11-29 02:53:25,045 INFO L140 encePairwiseOnDemand]: 101/108 looper letters, 375 selfloop transitions, 53 changer transitions 0/462 dead transitions. [2023-11-29 02:53:25,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 462 transitions, 4543 flow [2023-11-29 02:53:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:53:25,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:53:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 284 transitions. [2023-11-29 02:53:25,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259259259259259 [2023-11-29 02:53:25,047 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 284 transitions. [2023-11-29 02:53:25,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 284 transitions. [2023-11-29 02:53:25,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:53:25,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 284 transitions. [2023-11-29 02:53:25,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:53:25,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 108.0) internal successors, (648), 6 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:53:25,049 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 108.0) internal successors, (648), 6 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:53:25,050 INFO L175 Difference]: Start difference. First operand has 208 places, 466 transitions, 3717 flow. Second operand 5 states and 284 transitions. [2023-11-29 02:53:25,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 462 transitions, 4543 flow [2023-11-29 02:53:25,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 462 transitions, 4431 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 02:53:25,124 INFO L231 Difference]: Finished difference. Result has 205 places, 462 transitions, 3681 flow [2023-11-29 02:53:25,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=3575, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3681, PETRI_PLACES=205, PETRI_TRANSITIONS=462} [2023-11-29 02:53:25,125 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 108 predicate places. [2023-11-29 02:53:25,125 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 462 transitions, 3681 flow [2023-11-29 02:53:25,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.166666666666664) internal successors, (295), 6 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:53:25,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:53:25,125 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:53:25,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-11-29 02:53:25,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:53:25,325 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:53:25,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:53:25,326 INFO L85 PathProgramCache]: Analyzing trace with hash 862574323, now seen corresponding path program 1 times [2023-11-29 02:53:25,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:53:25,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284261710] [2023-11-29 02:53:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:53:25,327 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:53:25,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:53:25,328 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:53:25,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-29 02:53:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:53:25,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:53:25,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:53:25,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 02:53:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:53:25,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:53:25,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:53:25,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284261710] [2023-11-29 02:53:25,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284261710] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:53:25,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:53:25,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:53:25,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762535185] [2023-11-29 02:53:25,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:53:25,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:53:25,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:53:25,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:53:25,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:53:25,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 108 [2023-11-29 02:53:25,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 462 transitions, 3681 flow. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:53:25,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:53:25,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 108 [2023-11-29 02:53:25,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:53:36,051 INFO L124 PetriNetUnfolderBase]: 36903/59287 cut-off events. [2023-11-29 02:53:36,051 INFO L125 PetriNetUnfolderBase]: For 32762/37074 co-relation queries the response was YES. [2023-11-29 02:53:36,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137510 conditions, 59287 events. 36903/59287 cut-off events. For 32762/37074 co-relation queries the response was YES. Maximal size of possible extension queue 1952. Compared 492528 event pairs, 27390 based on Foata normal form. 0/45476 useless extension candidates. Maximal degree in co-relation 137442. Up to 48931 conditions per place. [2023-11-29 02:53:36,729 INFO L140 encePairwiseOnDemand]: 104/108 looper letters, 389 selfloop transitions, 37 changer transitions 0/460 dead transitions. [2023-11-29 02:53:36,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 460 transitions, 4527 flow [2023-11-29 02:53:36,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:53:36,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:53:36,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 233 transitions. [2023-11-29 02:53:36,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393518518518519 [2023-11-29 02:53:36,731 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 233 transitions. [2023-11-29 02:53:36,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 233 transitions. [2023-11-29 02:53:36,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:53:36,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 233 transitions. [2023-11-29 02:53:36,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:53:36,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:53:36,732 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:53:36,732 INFO L175 Difference]: Start difference. First operand has 205 places, 462 transitions, 3681 flow. Second operand 4 states and 233 transitions. [2023-11-29 02:53:36,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 460 transitions, 4527 flow [2023-11-29 02:53:36,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 460 transitions, 4457 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 02:53:36,796 INFO L231 Difference]: Finished difference. Result has 203 places, 460 transitions, 3679 flow [2023-11-29 02:53:36,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=3605, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3679, PETRI_PLACES=203, PETRI_TRANSITIONS=460} [2023-11-29 02:53:36,797 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 106 predicate places. [2023-11-29 02:53:36,797 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 460 transitions, 3679 flow [2023-11-29 02:53:36,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:53:36,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:53:36,797 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1] [2023-11-29 02:53:36,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2023-11-29 02:53:36,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:53:36,998 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:53:36,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:53:36,998 INFO L85 PathProgramCache]: Analyzing trace with hash 61109413, now seen corresponding path program 1 times [2023-11-29 02:53:36,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:53:36,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508931137] [2023-11-29 02:53:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:53:36,998 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:53:36,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:53:36,999 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:53:37,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-29 02:53:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:53:37,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 02:53:37,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:53:37,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 02:53:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:53:38,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:53:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:53:43,606 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:53:43,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508931137] [2023-11-29 02:53:43,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508931137] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:53:43,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:53:43,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2023-11-29 02:53:43,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542232255] [2023-11-29 02:53:43,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:53:43,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 02:53:43,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:53:43,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 02:53:43,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=556, Unknown=0, NotChecked=0, Total=756 [2023-11-29 02:54:04,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 108 [2023-11-29 02:54:04,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 460 transitions, 3679 flow. Second operand has 28 states, 28 states have (on average 48.857142857142854) internal successors, (1368), 28 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:54:04,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:54:04,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 108 [2023-11-29 02:54:04,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:54:25,173 WARN L293 SmtUtils]: Spent 7.08s on a formula simplification. DAG size of input: 132 DAG size of output: 131 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 02:54:29,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:54:33,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:54:37,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:54:41,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:54:45,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:54:49,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:54:53,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:54:57,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:54:59,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:55:03,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:55:07,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:55:12,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:55:16,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:55:20,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:55:24,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:55:28,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:55:32,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:55:36,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:55:40,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:55:42,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:55:46,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:55:50,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:56:02,852 WARN L293 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 121 DAG size of output: 120 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 02:56:41,784 INFO L124 PetriNetUnfolderBase]: 36931/59354 cut-off events. [2023-11-29 02:56:41,784 INFO L125 PetriNetUnfolderBase]: For 35074/39386 co-relation queries the response was YES. [2023-11-29 02:56:42,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137948 conditions, 59354 events. 36931/59354 cut-off events. For 35074/39386 co-relation queries the response was YES. Maximal size of possible extension queue 1942. Compared 493692 event pairs, 27390 based on Foata normal form. 45/45588 useless extension candidates. Maximal degree in co-relation 137880. Up to 49043 conditions per place. [2023-11-29 02:56:42,637 INFO L140 encePairwiseOnDemand]: 96/108 looper letters, 94 selfloop transitions, 404 changer transitions 0/529 dead transitions. [2023-11-29 02:56:42,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 529 transitions, 5504 flow [2023-11-29 02:56:42,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 02:56:42,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-11-29 02:56:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2564 transitions. [2023-11-29 02:56:42,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748148148148148 [2023-11-29 02:56:42,643 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2564 transitions. [2023-11-29 02:56:42,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2564 transitions. [2023-11-29 02:56:42,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:56:42,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2564 transitions. [2023-11-29 02:56:42,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 51.28) internal successors, (2564), 50 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:56:42,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 108.0) internal successors, (5508), 51 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:56:42,659 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 108.0) internal successors, (5508), 51 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:56:42,659 INFO L175 Difference]: Start difference. First operand has 203 places, 460 transitions, 3679 flow. Second operand 50 states and 2564 transitions. [2023-11-29 02:56:42,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 529 transitions, 5504 flow [2023-11-29 02:56:42,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 529 transitions, 5432 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-11-29 02:56:42,741 INFO L231 Difference]: Finished difference. Result has 262 places, 529 transitions, 5404 flow [2023-11-29 02:56:42,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=3621, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=5404, PETRI_PLACES=262, PETRI_TRANSITIONS=529} [2023-11-29 02:56:42,742 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 165 predicate places. [2023-11-29 02:56:42,742 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 529 transitions, 5404 flow [2023-11-29 02:56:42,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 48.857142857142854) internal successors, (1368), 28 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:56:42,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:56:42,743 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:42,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2023-11-29 02:56:42,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:56:42,944 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:56:42,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:42,944 INFO L85 PathProgramCache]: Analyzing trace with hash -668162678, now seen corresponding path program 1 times [2023-11-29 02:56:42,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:56:42,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613637629] [2023-11-29 02:56:42,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:42,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:56:42,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:56:42,945 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:56:42,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-11-29 02:56:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:43,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:56:43,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:56:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:56:43,260 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:56:43,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:56:43,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613637629] [2023-11-29 02:56:43,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613637629] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:56:43,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:56:43,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:56:43,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576778763] [2023-11-29 02:56:43,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:56:43,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:56:43,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:56:43,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:56:43,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:56:43,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 108 [2023-11-29 02:56:43,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 529 transitions, 5404 flow. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:56:43,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:56:43,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 108 [2023-11-29 02:56:43,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:56:59,540 INFO L124 PetriNetUnfolderBase]: 47520/77959 cut-off events. [2023-11-29 02:56:59,541 INFO L125 PetriNetUnfolderBase]: For 38873/44125 co-relation queries the response was YES. [2023-11-29 02:57:00,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177964 conditions, 77959 events. 47520/77959 cut-off events. For 38873/44125 co-relation queries the response was YES. Maximal size of possible extension queue 2367. Compared 682454 event pairs, 36177 based on Foata normal form. 672/60194 useless extension candidates. Maximal degree in co-relation 177884. Up to 49152 conditions per place. [2023-11-29 02:57:00,585 INFO L140 encePairwiseOnDemand]: 102/108 looper letters, 462 selfloop transitions, 63 changer transitions 0/559 dead transitions. [2023-11-29 02:57:00,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 559 transitions, 6552 flow [2023-11-29 02:57:00,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:57:00,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:57:00,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 276 transitions. [2023-11-29 02:57:00,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2023-11-29 02:57:00,587 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 276 transitions. [2023-11-29 02:57:00,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 276 transitions. [2023-11-29 02:57:00,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:57:00,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 276 transitions. [2023-11-29 02:57:00,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:57:00,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:57:00,590 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:57:00,590 INFO L175 Difference]: Start difference. First operand has 262 places, 529 transitions, 5404 flow. Second operand 4 states and 276 transitions. [2023-11-29 02:57:00,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 559 transitions, 6552 flow [2023-11-29 02:57:00,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 559 transitions, 5530 flow, removed 252 selfloop flow, removed 27 redundant places. [2023-11-29 02:57:00,676 INFO L231 Difference]: Finished difference. Result has 239 places, 529 transitions, 4572 flow [2023-11-29 02:57:00,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=4382, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4572, PETRI_PLACES=239, PETRI_TRANSITIONS=529} [2023-11-29 02:57:00,676 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 142 predicate places. [2023-11-29 02:57:00,677 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 529 transitions, 4572 flow [2023-11-29 02:57:00,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:57:00,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:57:00,677 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:57:00,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2023-11-29 02:57:00,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:57:00,877 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:57:00,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:57:00,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1549625323, now seen corresponding path program 1 times [2023-11-29 02:57:00,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:57:00,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795063703] [2023-11-29 02:57:00,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:00,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:57:00,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:57:00,879 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:57:00,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-11-29 02:57:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:57:01,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 02:57:01,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:57:01,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 02:57:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:57:01,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:57:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:57:03,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:57:03,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795063703] [2023-11-29 02:57:03,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795063703] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:57:03,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:57:03,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-29 02:57:03,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725225173] [2023-11-29 02:57:03,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:57:03,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:57:03,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:57:03,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:57:03,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:57:06,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 108 [2023-11-29 02:57:06,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 529 transitions, 4572 flow. Second operand has 10 states, 10 states have (on average 50.2) internal successors, (502), 10 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:57:06,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:57:06,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 108 [2023-11-29 02:57:06,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:57:44,885 INFO L124 PetriNetUnfolderBase]: 108922/178565 cut-off events. [2023-11-29 02:57:44,885 INFO L125 PetriNetUnfolderBase]: For 96807/109603 co-relation queries the response was YES. [2023-11-29 02:57:46,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406051 conditions, 178565 events. 108922/178565 cut-off events. For 96807/109603 co-relation queries the response was YES. Maximal size of possible extension queue 5142. Compared 1725932 event pairs, 82467 based on Foata normal form. 5184/140878 useless extension candidates. Maximal degree in co-relation 405971. Up to 49143 conditions per place. [2023-11-29 02:57:47,711 INFO L140 encePairwiseOnDemand]: 96/108 looper letters, 190 selfloop transitions, 406 changer transitions 0/627 dead transitions. [2023-11-29 02:57:47,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 627 transitions, 6102 flow [2023-11-29 02:57:47,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:57:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 02:57:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 673 transitions. [2023-11-29 02:57:47,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5664983164983165 [2023-11-29 02:57:47,715 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 673 transitions. [2023-11-29 02:57:47,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 673 transitions. [2023-11-29 02:57:47,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:57:47,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 673 transitions. [2023-11-29 02:57:47,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 61.18181818181818) internal successors, (673), 11 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:57:47,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 108.0) internal successors, (1296), 12 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:57:47,720 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 108.0) internal successors, (1296), 12 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:57:47,720 INFO L175 Difference]: Start difference. First operand has 239 places, 529 transitions, 4572 flow. Second operand 11 states and 673 transitions. [2023-11-29 02:57:47,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 627 transitions, 6102 flow [2023-11-29 02:57:47,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 627 transitions, 6038 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:57:47,846 INFO L231 Difference]: Finished difference. Result has 249 places, 529 transitions, 5376 flow [2023-11-29 02:57:47,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=4508, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5376, PETRI_PLACES=249, PETRI_TRANSITIONS=529} [2023-11-29 02:57:47,847 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 152 predicate places. [2023-11-29 02:57:47,848 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 529 transitions, 5376 flow [2023-11-29 02:57:47,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 50.2) internal successors, (502), 10 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:57:47,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:57:47,848 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:57:47,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2023-11-29 02:57:48,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:57:48,049 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-29 02:57:48,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:57:48,049 INFO L85 PathProgramCache]: Analyzing trace with hash 5305176, now seen corresponding path program 1 times [2023-11-29 02:57:48,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:57:48,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839107756] [2023-11-29 02:57:48,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:48,050 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:57:48,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:57:48,051 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:57:48,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e82fcf-9dbc-47ee-a33f-1d2fc061dda8/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-11-29 02:57:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:57:48,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:57:48,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:57:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:57:48,211 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:57:48,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:57:48,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839107756] [2023-11-29 02:57:48,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839107756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:57:48,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:57:48,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:57:48,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248298638] [2023-11-29 02:57:48,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:57:48,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:57:48,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:57:48,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:57:48,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:57:48,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 108 [2023-11-29 02:57:48,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 529 transitions, 5376 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:57:48,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:57:48,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 108 [2023-11-29 02:57:48,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand