./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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_804aafad-2259-469d-8261-d3689f17b8c5/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 5dd003755f1e361f3bbf00c3bfecbc1131b6df98a7806f5bb08971966b13d6ac --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:00:24,220 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:00:24,295 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 01:00:24,300 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:00:24,301 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:00:24,327 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:00:24,328 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:00:24,328 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:00:24,329 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:00:24,329 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:00:24,330 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:00:24,330 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:00:24,331 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:00:24,332 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:00:24,332 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:00:24,333 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:00:24,333 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:00:24,334 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:00:24,334 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:00:24,335 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:00:24,335 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 01:00:24,336 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 01:00:24,336 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 01:00:24,337 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:00:24,337 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 01:00:24,338 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 01:00:24,338 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:00:24,338 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:00:24,339 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:00:24,339 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:00:24,340 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:00:24,340 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:00:24,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:00:24,341 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:00:24,341 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:00:24,341 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:00:24,341 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:00:24,341 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:00:24,342 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:00:24,342 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:00:24,342 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:00:24,342 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_804aafad-2259-469d-8261-d3689f17b8c5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5dd003755f1e361f3bbf00c3bfecbc1131b6df98a7806f5bb08971966b13d6ac [2023-11-29 01:00:24,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:00:24,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:00:24,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:00:24,598 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:00:24,599 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:00:24,600 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-11-29 01:00:27,324 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:00:27,550 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:00:27,550 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-11-29 01:00:27,556 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/data/f819a27a4/8410c521a5a74f20b65e0b2ef0d1dcfb/FLAG372219e37 [2023-11-29 01:00:27,567 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/data/f819a27a4/8410c521a5a74f20b65e0b2ef0d1dcfb [2023-11-29 01:00:27,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:00:27,570 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:00:27,572 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:00:27,572 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:00:27,576 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:00:27,577 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:00:27" (1/1) ... [2023-11-29 01:00:27,578 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@552941c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:00:27, skipping insertion in model container [2023-11-29 01:00:27,578 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:00:27" (1/1) ... [2023-11-29 01:00:27,615 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:00:27,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:00:27,814 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 01:00:27,815 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@8d54f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:00:27, skipping insertion in model container [2023-11-29 01:00:27,815 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:00:27,816 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-29 01:00:27,818 INFO L158 Benchmark]: Toolchain (without parser) took 246.18ms. Allocated memory is still 188.7MB. Free memory was 157.7MB in the beginning and 151.5MB in the end (delta: 6.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-29 01:00:27,818 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 125.8MB. Free memory is still 92.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 01:00:27,819 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.13ms. Allocated memory is still 188.7MB. Free memory was 157.7MB in the beginning and 151.5MB in the end (delta: 6.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-29 01:00:27,820 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 125.8MB. Free memory is still 92.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 244.13ms. Allocated memory is still 188.7MB. Free memory was 157.7MB in the beginning and 151.5MB in the end (delta: 6.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 144]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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_804aafad-2259-469d-8261-d3689f17b8c5/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 5dd003755f1e361f3bbf00c3bfecbc1131b6df98a7806f5bb08971966b13d6ac --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:00:29,561 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:00:29,636 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 01:00:29,642 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:00:29,643 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:00:29,671 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:00:29,672 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:00:29,672 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:00:29,673 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:00:29,674 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:00:29,674 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:00:29,675 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:00:29,676 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:00:29,676 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:00:29,677 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:00:29,677 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:00:29,678 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:00:29,678 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:00:29,679 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:00:29,679 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:00:29,680 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 01:00:29,681 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 01:00:29,681 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 01:00:29,681 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:00:29,682 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 01:00:29,682 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 01:00:29,683 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 01:00:29,683 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 01:00:29,683 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:00:29,684 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:00:29,684 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:00:29,685 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:00:29,685 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:00:29,685 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:00:29,686 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:00:29,686 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:00:29,686 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:00:29,686 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 01:00:29,687 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 01:00:29,687 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:00:29,687 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:00:29,687 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:00:29,688 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:00:29,688 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 01:00:29,688 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_804aafad-2259-469d-8261-d3689f17b8c5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5dd003755f1e361f3bbf00c3bfecbc1131b6df98a7806f5bb08971966b13d6ac [2023-11-29 01:00:29,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:00:29,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:00:29,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:00:29,995 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:00:29,996 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:00:29,997 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-11-29 01:00:32,788 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:00:32,970 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:00:32,971 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-11-29 01:00:32,979 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/data/4e82fce3b/2d4d8c65253741ac9578e0dadb68f372/FLAG5b8cced9d [2023-11-29 01:00:32,994 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/data/4e82fce3b/2d4d8c65253741ac9578e0dadb68f372 [2023-11-29 01:00:32,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:00:32,998 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:00:33,000 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:00:33,000 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:00:33,005 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:00:33,006 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:00:32" (1/1) ... [2023-11-29 01:00:33,007 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66b42e34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:00:33, skipping insertion in model container [2023-11-29 01:00:33,008 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:00:32" (1/1) ... [2023-11-29 01:00:33,037 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:00:33,241 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:00:33,256 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 01:00:33,261 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:00:33,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:00:33,290 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:00:33,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:00:33,332 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:00:33,332 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:00:33,340 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:00:33,341 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:00:33 WrapperNode [2023-11-29 01:00:33,341 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:00:33,342 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:00:33,342 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:00:33,342 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:00:33,349 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:00:33" (1/1) ... [2023-11-29 01:00:33,361 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:00:33" (1/1) ... [2023-11-29 01:00:33,396 INFO L138 Inliner]: procedures = 28, calls = 56, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 265 [2023-11-29 01:00:33,397 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:00:33,397 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:00:33,398 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:00:33,398 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:00:33,409 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:00:33" (1/1) ... [2023-11-29 01:00:33,409 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:00:33" (1/1) ... [2023-11-29 01:00:33,414 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:00:33" (1/1) ... [2023-11-29 01:00:33,433 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 2, 7, 2, 2]. 47 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 5 writes are split as follows [0, 1, 2, 1, 1]. [2023-11-29 01:00:33,434 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:00:33" (1/1) ... [2023-11-29 01:00:33,434 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:00:33" (1/1) ... [2023-11-29 01:00:33,448 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:00:33" (1/1) ... [2023-11-29 01:00:33,453 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:00:33" (1/1) ... [2023-11-29 01:00:33,456 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:00:33" (1/1) ... [2023-11-29 01:00:33,458 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:00:33" (1/1) ... [2023-11-29 01:00:33,463 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:00:33,464 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:00:33,464 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:00:33,464 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:00:33,465 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:00:33" (1/1) ... [2023-11-29 01:00:33,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:00:33,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:00:33,498 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:00:33,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:00:33,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:00:33,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 01:00:33,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 01:00:33,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 01:00:33,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 01:00:33,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-29 01:00:33,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:00:33,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 01:00:33,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 01:00:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 01:00:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 01:00:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-29 01:00:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 01:00:33,536 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 01:00:33,537 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 01:00:33,537 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 01:00:33,537 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 01:00:33,537 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 01:00:33,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 01:00:33,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 01:00:33,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 01:00:33,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:00:33,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:00:33,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:00:33,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 01:00:33,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 01:00:33,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 01:00:33,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 01:00:33,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-29 01:00:33,541 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 01:00:33,682 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:00:33,684 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:00:34,280 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:00:34,670 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:00:34,671 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-29 01:00:34,671 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:00:34 BoogieIcfgContainer [2023-11-29 01:00:34,671 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:00:34,674 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:00:34,674 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:00:34,677 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:00:34,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:00:32" (1/3) ... [2023-11-29 01:00:34,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edc5db9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:00:34, skipping insertion in model container [2023-11-29 01:00:34,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:00:33" (2/3) ... [2023-11-29 01:00:34,679 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edc5db9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:00:34, skipping insertion in model container [2023-11-29 01:00:34,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:00:34" (3/3) ... [2023-11-29 01:00:34,680 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2023-11-29 01:00:34,699 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:00:34,699 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-11-29 01:00:34,699 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 01:00:34,772 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 01:00:34,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 82 transitions, 185 flow [2023-11-29 01:00:34,847 INFO L124 PetriNetUnfolderBase]: 7/79 cut-off events. [2023-11-29 01:00:34,847 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 01:00:34,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 79 events. 7/79 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 195 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-11-29 01:00:34,852 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 82 transitions, 185 flow [2023-11-29 01:00:34,857 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 78 transitions, 174 flow [2023-11-29 01:00:34,867 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:00:34,874 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;@4f9903ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:00:34,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-11-29 01:00:34,878 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:00:34,878 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-29 01:00:34,878 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:00:34,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:00:34,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:00:34,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:00:34,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:00:34,885 INFO L85 PathProgramCache]: Analyzing trace with hash 779342, now seen corresponding path program 1 times [2023-11-29 01:00:34,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:00:34,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827274470] [2023-11-29 01:00:34,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:00:34,911 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 01:00:34,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:00:34,914 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:34,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:00:35,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:00:35,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:00:35,153 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 01:00:35,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,171 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 01:00:35,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,183 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 01:00:35,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,190 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 01:00:35,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,205 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 11 treesize of output 1 [2023-11-29 01:00:35,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,221 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 01:00:35,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,250 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 01:00:35,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,276 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 01:00:35,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,295 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 01:00:35,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,304 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 11 treesize of output 1 [2023-11-29 01:00:35,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,318 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 01:00:35,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,333 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 01:00:35,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,362 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 01:00:35,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 01:00:35,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,381 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 01:00:35,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,386 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 01:00:35,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 01:00:35,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,400 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 01:00:35,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,409 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 01:00:35,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,417 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 01:00:35,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,427 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 01:00:35,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,432 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 01:00:35,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,443 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 01:00:35,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:35,458 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 01:00:35,467 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 01:00:35,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:00:35,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:00:35,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827274470] [2023-11-29 01:00:35,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827274470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:00:35,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:00:35,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:00:35,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824744186] [2023-11-29 01:00:35,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:00:35,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:00:35,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:00:35,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:00:35,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:00:35,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 82 [2023-11-29 01:00:35,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 01:00:35,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:00:35,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 82 [2023-11-29 01:00:35,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:00:36,806 INFO L124 PetriNetUnfolderBase]: 4027/7690 cut-off events. [2023-11-29 01:00:36,806 INFO L125 PetriNetUnfolderBase]: For 335/335 co-relation queries the response was YES. [2023-11-29 01:00:36,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13391 conditions, 7690 events. 4027/7690 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 63794 event pairs, 3528 based on Foata normal form. 379/4895 useless extension candidates. Maximal degree in co-relation 13191. Up to 5391 conditions per place. [2023-11-29 01:00:36,897 INFO L140 encePairwiseOnDemand]: 75/82 looper letters, 40 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-11-29 01:00:36,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 246 flow [2023-11-29 01:00:36,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:00:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:00:36,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2023-11-29 01:00:36,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2023-11-29 01:00:36,911 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 149 transitions. [2023-11-29 01:00:36,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 149 transitions. [2023-11-29 01:00:36,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:00:36,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 149 transitions. [2023-11-29 01:00:36,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 01:00:36,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 01:00:36,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 01:00:36,947 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 174 flow. Second operand 3 states and 149 transitions. [2023-11-29 01:00:36,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 246 flow [2023-11-29 01:00:36,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 234 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 01:00:36,972 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 154 flow [2023-11-29 01:00:36,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2023-11-29 01:00:36,978 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -8 predicate places. [2023-11-29 01:00:36,978 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 154 flow [2023-11-29 01:00:36,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 01:00:36,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:00:36,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:00:36,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:37,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:37,179 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:00:37,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:00:37,180 INFO L85 PathProgramCache]: Analyzing trace with hash 779343, now seen corresponding path program 1 times [2023-11-29 01:00:37,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:00:37,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488407950] [2023-11-29 01:00:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:00:37,181 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 01:00:37,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:00:37,182 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:37,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:00:37,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:00:37,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:00:37,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 01:00:37,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,319 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 01:00:37,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 01:00:37,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,339 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 01:00:37,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,348 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 01:00:37,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,359 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 01:00:37,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 01:00:37,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,395 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 01:00:37,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,408 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 01:00:37,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,416 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 01:00:37,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,428 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 01:00:37,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,436 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 01:00:37,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,466 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 01:00:37,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,498 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 01:00:37,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,522 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 01:00:37,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,533 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 01:00:37,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,558 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 01:00:37,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 01:00:37,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,582 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 01:00:37,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,592 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 01:00:37,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,604 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 01:00:37,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,611 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 01:00:37,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,624 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 01:00:37,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:37,642 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 01:00:37,734 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 01:00:37,735 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:00:37,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:00:37,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488407950] [2023-11-29 01:00:37,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488407950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:00:37,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:00:37,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:00:37,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120695050] [2023-11-29 01:00:37,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:00:37,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:00:37,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:00:37,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:00:37,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:00:37,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 82 [2023-11-29 01:00:37,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 01:00:37,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:00:37,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 82 [2023-11-29 01:00:37,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:00:39,297 INFO L124 PetriNetUnfolderBase]: 4029/7696 cut-off events. [2023-11-29 01:00:39,297 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-11-29 01:00:39,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13217 conditions, 7696 events. 4029/7696 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 63907 event pairs, 3528 based on Foata normal form. 0/4520 useless extension candidates. Maximal degree in co-relation 13181. Up to 5400 conditions per place. [2023-11-29 01:00:39,364 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 43 selfloop transitions, 7 changer transitions 0/78 dead transitions. [2023-11-29 01:00:39,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 78 transitions, 268 flow [2023-11-29 01:00:39,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:00:39,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:00:39,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 188 transitions. [2023-11-29 01:00:39,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2023-11-29 01:00:39,367 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 188 transitions. [2023-11-29 01:00:39,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 188 transitions. [2023-11-29 01:00:39,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:00:39,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 188 transitions. [2023-11-29 01:00:39,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states 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 01:00:39,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 01:00:39,372 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 01:00:39,372 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 154 flow. Second operand 4 states and 188 transitions. [2023-11-29 01:00:39,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 78 transitions, 268 flow [2023-11-29 01:00:39,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:00:39,375 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 206 flow [2023-11-29 01:00:39,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2023-11-29 01:00:39,376 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -4 predicate places. [2023-11-29 01:00:39,376 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 206 flow [2023-11-29 01:00:39,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 01:00:39,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:00:39,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-29 01:00:39,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-29 01:00:39,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:39,581 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:00:39,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:00:39,581 INFO L85 PathProgramCache]: Analyzing trace with hash 24160893, now seen corresponding path program 1 times [2023-11-29 01:00:39,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:00:39,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877051761] [2023-11-29 01:00:39,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:00:39,582 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 01:00:39,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:00:39,583 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:39,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:00:39,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:00:39,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:00:39,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:39,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:39,735 INFO L349 Elim1Store]: treesize reduction 44, result has 25.4 percent of original size [2023-11-29 01:00:39,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 29 [2023-11-29 01:00:39,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:39,823 INFO L349 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2023-11-29 01:00:39,823 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 4 case distinctions, treesize of input 42 treesize of output 37 [2023-11-29 01:00:39,973 INFO L349 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-11-29 01:00:39,973 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 3 case distinctions, treesize of input 52 treesize of output 75 [2023-11-29 01:00:40,356 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 01:00:40,356 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:00:40,357 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:00:40,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877051761] [2023-11-29 01:00:40,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877051761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:00:40,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:00:40,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:00:40,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628409344] [2023-11-29 01:00:40,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:00:40,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:00:40,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:00:40,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:00:40,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:00:40,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 82 [2023-11-29 01:00:40,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 01:00:40,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:00:40,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 82 [2023-11-29 01:00:40,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:00:41,303 INFO L124 PetriNetUnfolderBase]: 4029/7295 cut-off events. [2023-11-29 01:00:41,303 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-11-29 01:00:41,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12835 conditions, 7295 events. 4029/7295 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 56351 event pairs, 3528 based on Foata normal form. 701/5224 useless extension candidates. Maximal degree in co-relation 12791. Up to 5402 conditions per place. [2023-11-29 01:00:41,348 INFO L140 encePairwiseOnDemand]: 79/82 looper letters, 47 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-11-29 01:00:41,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 76 transitions, 298 flow [2023-11-29 01:00:41,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:00:41,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:00:41,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2023-11-29 01:00:41,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2023-11-29 01:00:41,350 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 146 transitions. [2023-11-29 01:00:41,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 146 transitions. [2023-11-29 01:00:41,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:00:41,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 146 transitions. [2023-11-29 01:00:41,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 01:00:41,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 01:00:41,353 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 01:00:41,353 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 206 flow. Second operand 3 states and 146 transitions. [2023-11-29 01:00:41,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 76 transitions, 298 flow [2023-11-29 01:00:41,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 76 transitions, 298 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 01:00:41,356 INFO L231 Difference]: Finished difference. Result has 77 places, 76 transitions, 204 flow [2023-11-29 01:00:41,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=77, PETRI_TRANSITIONS=76} [2023-11-29 01:00:41,357 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -4 predicate places. [2023-11-29 01:00:41,357 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 76 transitions, 204 flow [2023-11-29 01:00:41,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 01:00:41,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:00:41,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-29 01:00:41,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:41,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:41,558 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:00:41,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:00:41,559 INFO L85 PathProgramCache]: Analyzing trace with hash 24160894, now seen corresponding path program 1 times [2023-11-29 01:00:41,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:00:41,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808070305] [2023-11-29 01:00:41,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:00:41,560 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 01:00:41,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:00:41,561 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:41,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:00:41,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 01:00:41,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:00:41,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:41,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:41,704 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 01:00:41,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:41,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:41,725 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 01:00:41,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:41,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:41,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:41,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:41,788 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 01:00:41,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:41,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:41,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:41,818 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 01:00:41,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:41,857 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 01:00:41,903 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 01:00:41,903 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:00:41,903 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:00:41,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808070305] [2023-11-29 01:00:41,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808070305] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:00:41,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:00:41,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:00:41,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434677447] [2023-11-29 01:00:41,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:00:41,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:00:41,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:00:41,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:00:41,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:00:42,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 82 [2023-11-29 01:00:42,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:00:42,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:00:42,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 82 [2023-11-29 01:00:42,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:00:42,628 INFO L124 PetriNetUnfolderBase]: 4029/6894 cut-off events. [2023-11-29 01:00:42,628 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-11-29 01:00:42,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12436 conditions, 6894 events. 4029/6894 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 49112 event pairs, 3528 based on Foata normal form. 701/5224 useless extension candidates. Maximal degree in co-relation 12425. Up to 5402 conditions per place. [2023-11-29 01:00:42,658 INFO L140 encePairwiseOnDemand]: 79/82 looper letters, 47 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-11-29 01:00:42,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 74 transitions, 296 flow [2023-11-29 01:00:42,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:00:42,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:00:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2023-11-29 01:00:42,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2023-11-29 01:00:42,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 146 transitions. [2023-11-29 01:00:42,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 146 transitions. [2023-11-29 01:00:42,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:00:42,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 146 transitions. [2023-11-29 01:00:42,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 01:00:42,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 01:00:42,663 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 01:00:42,664 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 204 flow. Second operand 3 states and 146 transitions. [2023-11-29 01:00:42,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 74 transitions, 296 flow [2023-11-29 01:00:42,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 295 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:00:42,667 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 201 flow [2023-11-29 01:00:42,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2023-11-29 01:00:42,668 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -5 predicate places. [2023-11-29 01:00:42,668 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 201 flow [2023-11-29 01:00:42,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:00:42,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:00:42,669 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-29 01:00:42,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:42,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:42,871 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:00:42,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:00:42,872 INFO L85 PathProgramCache]: Analyzing trace with hash 748973581, now seen corresponding path program 1 times [2023-11-29 01:00:42,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:00:42,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222696313] [2023-11-29 01:00:42,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:00:42,873 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 01:00:42,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:00:42,874 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:42,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:00:42,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 01:00:42,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:00:42,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 01:00:42,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:42,972 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 01:00:42,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:42,983 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 01:00:42,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:42,989 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 01:00:43,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,007 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 01:00:43,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,016 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 01:00:43,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,038 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 01:00:43,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,068 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 01:00:43,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,081 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 01:00:43,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,098 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 01:00:43,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,117 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 01:00:43,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,127 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 01:00:43,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,139 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 01:00:43,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,145 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 01:00:43,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,157 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 01:00:43,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,163 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 01:00:43,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,174 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 01:00:43,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,193 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 01:00:43,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,206 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 01:00:43,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 01:00:43,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,235 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 01:00:43,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,240 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 01:00:43,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,252 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 01:00:43,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:43,258 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 01:00:43,397 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 01:00:43,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:00:43,748 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 01:00:43,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:00:43,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222696313] [2023-11-29 01:00:43,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222696313] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:00:43,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:00:43,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 01:00:43,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989121580] [2023-11-29 01:00:43,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:00:43,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:00:43,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:00:43,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:00:43,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:00:44,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 82 [2023-11-29 01:00:44,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 201 flow. Second operand has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 01:00:44,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:00:44,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 82 [2023-11-29 01:00:44,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:00:47,195 INFO L124 PetriNetUnfolderBase]: 4035/6912 cut-off events. [2023-11-29 01:00:47,195 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-29 01:00:47,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12496 conditions, 6912 events. 4035/6912 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 49237 event pairs, 3528 based on Foata normal form. 0/4536 useless extension candidates. Maximal degree in co-relation 12484. Up to 5403 conditions per place. [2023-11-29 01:00:47,233 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 43 selfloop transitions, 25 changer transitions 0/92 dead transitions. [2023-11-29 01:00:47,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 92 transitions, 415 flow [2023-11-29 01:00:47,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:00:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 01:00:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 414 transitions. [2023-11-29 01:00:47,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048780487804878 [2023-11-29 01:00:47,237 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 414 transitions. [2023-11-29 01:00:47,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 414 transitions. [2023-11-29 01:00:47,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:00:47,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 414 transitions. [2023-11-29 01:00:47,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 41.4) internal successors, (414), 10 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 01:00:47,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 82.0) internal successors, (902), 11 states have internal predecessors, (902), 0 states have call successors, (0), 0 states 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 01:00:47,243 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 82.0) internal successors, (902), 11 states have internal predecessors, (902), 0 states have call successors, (0), 0 states 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 01:00:47,243 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 201 flow. Second operand 10 states and 414 transitions. [2023-11-29 01:00:47,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 92 transitions, 415 flow [2023-11-29 01:00:47,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 92 transitions, 414 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:00:47,247 INFO L231 Difference]: Finished difference. Result has 87 places, 92 transitions, 362 flow [2023-11-29 01:00:47,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=362, PETRI_PLACES=87, PETRI_TRANSITIONS=92} [2023-11-29 01:00:47,248 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 6 predicate places. [2023-11-29 01:00:47,248 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 92 transitions, 362 flow [2023-11-29 01:00:47,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 01:00:47,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:00:47,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:00:47,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:47,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:47,451 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:00:47,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:00:47,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1776539157, now seen corresponding path program 1 times [2023-11-29 01:00:47,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:00:47,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45712559] [2023-11-29 01:00:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:00:47,452 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 01:00:47,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:00:47,453 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:47,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:00:47,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:00:47,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:00:47,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:47,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:47,575 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 01:00:47,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:47,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:47,611 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 01:00:47,611 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 01:00:47,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:47,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:47,643 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 17 treesize of output 11 [2023-11-29 01:00:47,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:47,681 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 01:00:47,681 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 01:00:47,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:47,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:47,727 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 01:00:47,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 01:00:47,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:47,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:47,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:47,752 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 0 case distinctions, treesize of input 22 treesize of output 11 [2023-11-29 01:00:47,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:47,785 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 01:00:47,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2023-11-29 01:00:47,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:47,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:47,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 01:00:47,843 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 01:00:47,844 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 01:00:47,889 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 01:00:47,889 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:00:47,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:00:47,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45712559] [2023-11-29 01:00:47,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45712559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:00:47,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:00:47,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:00:47,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889000832] [2023-11-29 01:00:47,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:00:47,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:00:47,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:00:47,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:00:47,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:00:47,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 82 [2023-11-29 01:00:47,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 92 transitions, 362 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 01:00:47,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:00:47,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 82 [2023-11-29 01:00:47,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:00:48,677 INFO L124 PetriNetUnfolderBase]: 4035/6871 cut-off events. [2023-11-29 01:00:48,677 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2023-11-29 01:00:48,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12498 conditions, 6871 events. 4035/6871 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 48614 event pairs, 3528 based on Foata normal form. 67/4608 useless extension candidates. Maximal degree in co-relation 12482. Up to 5420 conditions per place. [2023-11-29 01:00:48,710 INFO L140 encePairwiseOnDemand]: 79/82 looper letters, 65 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2023-11-29 01:00:48,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 90 transitions, 490 flow [2023-11-29 01:00:48,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:00:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:00:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2023-11-29 01:00:48,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2023-11-29 01:00:48,711 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 146 transitions. [2023-11-29 01:00:48,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 146 transitions. [2023-11-29 01:00:48,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:00:48,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 146 transitions. [2023-11-29 01:00:48,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 01:00:48,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 01:00:48,713 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 01:00:48,713 INFO L175 Difference]: Start difference. First operand has 87 places, 92 transitions, 362 flow. Second operand 3 states and 146 transitions. [2023-11-29 01:00:48,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 90 transitions, 490 flow [2023-11-29 01:00:48,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 90 transitions, 426 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-11-29 01:00:48,716 INFO L231 Difference]: Finished difference. Result has 83 places, 90 transitions, 296 flow [2023-11-29 01:00:48,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=296, PETRI_PLACES=83, PETRI_TRANSITIONS=90} [2023-11-29 01:00:48,717 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 2 predicate places. [2023-11-29 01:00:48,718 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 90 transitions, 296 flow [2023-11-29 01:00:48,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 01:00:48,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:00:48,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:00:48,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:48,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:48,919 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:00:48,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:00:48,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1776539156, now seen corresponding path program 1 times [2023-11-29 01:00:48,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:00:48,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676570875] [2023-11-29 01:00:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:00:48,919 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 01:00:48,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:00:48,920 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:48,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:00:49,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:00:49,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:00:49,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:49,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:49,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 01:00:49,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:49,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:49,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:49,083 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 01:00:49,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:49,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:49,094 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 01:00:49,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:49,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:49,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:49,120 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 01:00:49,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:49,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:49,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:49,153 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 01:00:49,169 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 01:00:49,176 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 01:00:49,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:49,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:49,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:49,204 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 01:00:49,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:49,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:49,215 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 01:00:49,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:49,243 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 01:00:49,306 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 01:00:49,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:00:49,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:00:49,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676570875] [2023-11-29 01:00:49,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676570875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:00:49,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:00:49,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:00:49,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042846219] [2023-11-29 01:00:49,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:00:49,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:00:49,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:00:49,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:00:49,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:00:49,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 82 [2023-11-29 01:00:49,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 90 transitions, 296 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 01:00:49,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:00:49,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 82 [2023-11-29 01:00:49,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:00:50,079 INFO L124 PetriNetUnfolderBase]: 4035/6830 cut-off events. [2023-11-29 01:00:50,079 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2023-11-29 01:00:50,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12426 conditions, 6830 events. 4035/6830 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 47923 event pairs, 3528 based on Foata normal form. 67/4607 useless extension candidates. Maximal degree in co-relation 12411. Up to 5420 conditions per place. [2023-11-29 01:00:50,104 INFO L140 encePairwiseOnDemand]: 79/82 looper letters, 65 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2023-11-29 01:00:50,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 88 transitions, 424 flow [2023-11-29 01:00:50,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:00:50,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:00:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2023-11-29 01:00:50,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2023-11-29 01:00:50,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 146 transitions. [2023-11-29 01:00:50,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 146 transitions. [2023-11-29 01:00:50,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:00:50,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 146 transitions. [2023-11-29 01:00:50,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 01:00:50,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 01:00:50,107 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 01:00:50,107 INFO L175 Difference]: Start difference. First operand has 83 places, 90 transitions, 296 flow. Second operand 3 states and 146 transitions. [2023-11-29 01:00:50,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 88 transitions, 424 flow [2023-11-29 01:00:50,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 88 transitions, 423 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:00:50,110 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 293 flow [2023-11-29 01:00:50,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2023-11-29 01:00:50,111 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 1 predicate places. [2023-11-29 01:00:50,111 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 293 flow [2023-11-29 01:00:50,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 01:00:50,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:00:50,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:00:50,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:50,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:50,312 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:00:50,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:00:50,312 INFO L85 PathProgramCache]: Analyzing trace with hash 761892635, now seen corresponding path program 1 times [2023-11-29 01:00:50,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:00:50,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32508819] [2023-11-29 01:00:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:00:50,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 01:00:50,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:00:50,314 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:50,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:00:50,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:00:50,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:00:50,421 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 01:00:50,421 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:00:50,421 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:00:50,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32508819] [2023-11-29 01:00:50,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32508819] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:00:50,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:00:50,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:00:50,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61522496] [2023-11-29 01:00:50,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:00:50,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:00:50,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:00:50,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:00:50,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:00:50,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 82 [2023-11-29 01:00:50,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 293 flow. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 01:00:50,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:00:50,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 82 [2023-11-29 01:00:50,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:00:51,239 INFO L124 PetriNetUnfolderBase]: 4198/7181 cut-off events. [2023-11-29 01:00:51,239 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-11-29 01:00:51,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13076 conditions, 7181 events. 4198/7181 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 50379 event pairs, 3675 based on Foata normal form. 113/5059 useless extension candidates. Maximal degree in co-relation 13060. Up to 5418 conditions per place. [2023-11-29 01:00:51,267 INFO L140 encePairwiseOnDemand]: 70/82 looper letters, 92 selfloop transitions, 3 changer transitions 1/118 dead transitions. [2023-11-29 01:00:51,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 118 transitions, 590 flow [2023-11-29 01:00:51,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:00:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:00:51,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 216 transitions. [2023-11-29 01:00:51,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2023-11-29 01:00:51,268 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 216 transitions. [2023-11-29 01:00:51,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 216 transitions. [2023-11-29 01:00:51,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:00:51,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 216 transitions. [2023-11-29 01:00:51,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 01:00:51,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 01:00:51,270 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 01:00:51,270 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 293 flow. Second operand 4 states and 216 transitions. [2023-11-29 01:00:51,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 118 transitions, 590 flow [2023-11-29 01:00:51,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 118 transitions, 589 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:00:51,273 INFO L231 Difference]: Finished difference. Result has 85 places, 88 transitions, 317 flow [2023-11-29 01:00:51,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=317, PETRI_PLACES=85, PETRI_TRANSITIONS=88} [2023-11-29 01:00:51,274 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 4 predicate places. [2023-11-29 01:00:51,274 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 88 transitions, 317 flow [2023-11-29 01:00:51,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 01:00:51,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:00:51,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:00:51,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:51,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:51,475 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:00:51,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:00:51,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2004769005, now seen corresponding path program 1 times [2023-11-29 01:00:51,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:00:51,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096339808] [2023-11-29 01:00:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:00:51,476 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 01:00:51,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:00:51,477 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:51,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:00:51,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:00:51,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:00:51,575 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 01:00:51,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-29 01:00:51,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:51,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:51,596 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 01:00:51,596 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 01:00:51,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:51,604 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 01:00:51,604 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 01:00:51,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:51,614 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 01:00:51,614 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 01:00:51,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:51,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:51,634 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 01:00:51,634 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 01:00:51,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:51,641 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 01:00:51,641 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 01:00:51,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:51,650 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 01:00:51,650 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 01:00:51,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:51,657 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 01:00:51,658 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 01:00:51,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:51,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:51,677 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 01:00:51,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-29 01:00:51,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:51,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:51,699 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 01:00:51,700 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 01:00:51,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:51,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:51,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:51,731 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 01:00:51,731 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 01:00:51,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:51,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:51,751 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 01:00:51,751 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 01:00:51,766 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 01:00:51,766 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 01:00:51,786 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 01:00:51,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:00:51,787 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:00:51,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096339808] [2023-11-29 01:00:51,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096339808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:00:51,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:00:51,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:00:51,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73811820] [2023-11-29 01:00:51,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:00:51,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:00:51,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:00:51,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:00:51,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:00:51,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 82 [2023-11-29 01:00:51,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 88 transitions, 317 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 01:00:51,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:00:51,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 82 [2023-11-29 01:00:51,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:00:52,496 INFO L124 PetriNetUnfolderBase]: 4411/7173 cut-off events. [2023-11-29 01:00:52,496 INFO L125 PetriNetUnfolderBase]: For 593/593 co-relation queries the response was YES. [2023-11-29 01:00:52,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14951 conditions, 7173 events. 4411/7173 cut-off events. For 593/593 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 47573 event pairs, 3868 based on Foata normal form. 0/4884 useless extension candidates. Maximal degree in co-relation 14933. Up to 6000 conditions per place. [2023-11-29 01:00:52,526 INFO L140 encePairwiseOnDemand]: 79/82 looper letters, 67 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-11-29 01:00:52,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 86 transitions, 449 flow [2023-11-29 01:00:52,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:00:52,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:00:52,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2023-11-29 01:00:52,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2023-11-29 01:00:52,527 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 142 transitions. [2023-11-29 01:00:52,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 142 transitions. [2023-11-29 01:00:52,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:00:52,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 142 transitions. [2023-11-29 01:00:52,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 01:00:52,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 01:00:52,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 01:00:52,529 INFO L175 Difference]: Start difference. First operand has 85 places, 88 transitions, 317 flow. Second operand 3 states and 142 transitions. [2023-11-29 01:00:52,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 86 transitions, 449 flow [2023-11-29 01:00:52,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 86 transitions, 445 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 01:00:52,532 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 311 flow [2023-11-29 01:00:52,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=311, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2023-11-29 01:00:52,532 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 3 predicate places. [2023-11-29 01:00:52,532 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 311 flow [2023-11-29 01:00:52,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 01:00:52,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:00:52,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:00:52,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:52,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:52,733 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:00:52,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:00:52,733 INFO L85 PathProgramCache]: Analyzing trace with hash 2004769006, now seen corresponding path program 1 times [2023-11-29 01:00:52,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:00:52,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280546876] [2023-11-29 01:00:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:00:52,734 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 01:00:52,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:00:52,735 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:52,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:00:52,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 01:00:52,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:00:52,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:52,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:52,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 01:00:52,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-29 01:00:52,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:52,893 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 01:00:52,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:52,900 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 01:00:52,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:52,910 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 01:00:52,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:52,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:52,921 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 01:00:52,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:52,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:52,932 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 01:00:52,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:52,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:52,946 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 01:00:52,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:52,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:52,965 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 01:00:52,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:52,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:52,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 01:00:52,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:52,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:52,990 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 01:00:52,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:53,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:53,008 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 01:00:53,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:53,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:53,019 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 01:00:53,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:53,046 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 01:00:53,152 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 01:00:53,153 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:00:53,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:00:53,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280546876] [2023-11-29 01:00:53,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280546876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:00:53,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:00:53,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:00:53,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346076374] [2023-11-29 01:00:53,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:00:53,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:00:53,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:00:53,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:00:53,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:00:53,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 82 [2023-11-29 01:00:53,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 311 flow. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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 01:00:53,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:00:53,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 82 [2023-11-29 01:00:53,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:00:53,971 INFO L124 PetriNetUnfolderBase]: 4198/6837 cut-off events. [2023-11-29 01:00:53,971 INFO L125 PetriNetUnfolderBase]: For 565/565 co-relation queries the response was YES. [2023-11-29 01:00:53,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14208 conditions, 6837 events. 4198/6837 cut-off events. For 565/565 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 45395 event pairs, 3675 based on Foata normal form. 113/4753 useless extension candidates. Maximal degree in co-relation 14189. Up to 5684 conditions per place. [2023-11-29 01:00:54,001 INFO L140 encePairwiseOnDemand]: 79/82 looper letters, 65 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-11-29 01:00:54,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 439 flow [2023-11-29 01:00:54,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:00:54,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:00:54,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2023-11-29 01:00:54,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2023-11-29 01:00:54,003 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 146 transitions. [2023-11-29 01:00:54,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 146 transitions. [2023-11-29 01:00:54,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:00:54,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 146 transitions. [2023-11-29 01:00:54,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 01:00:54,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 01:00:54,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 01:00:54,005 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 311 flow. Second operand 3 states and 146 transitions. [2023-11-29 01:00:54,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 439 flow [2023-11-29 01:00:54,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 84 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:00:54,009 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 300 flow [2023-11-29 01:00:54,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2023-11-29 01:00:54,010 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 1 predicate places. [2023-11-29 01:00:54,010 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 300 flow [2023-11-29 01:00:54,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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 01:00:54,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:00:54,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:00:54,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:54,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:54,211 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:00:54,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:00:54,211 INFO L85 PathProgramCache]: Analyzing trace with hash 737635357, now seen corresponding path program 1 times [2023-11-29 01:00:54,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:00:54,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401823352] [2023-11-29 01:00:54,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:00:54,212 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 01:00:54,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:00:54,213 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:54,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:00:54,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:00:54,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:00:54,334 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 7 [2023-11-29 01:00:54,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,341 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 01:00:54,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,359 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 01:00:54,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,369 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 01:00:54,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,376 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 01:00:54,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 01:00:54,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 01:00:54,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,405 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 01:00:54,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,409 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 01:00:54,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 01:00:54,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,420 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 01:00:54,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 01:00:54,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 01:00:54,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,441 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 01:00:54,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,445 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 01:00:54,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 01:00:54,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,455 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 01:00:54,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,460 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 01:00:54,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,467 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 01:00:54,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,471 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 01:00:54,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,475 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 01:00:54,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,480 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 01:00:54,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,492 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 16 treesize of output 1 [2023-11-29 01:00:54,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:54,497 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 01:00:54,522 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-29 01:00:54,522 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 01:00:54,537 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 01:00:54,537 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:00:54,537 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:00:54,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401823352] [2023-11-29 01:00:54,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401823352] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:00:54,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:00:54,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:00:54,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528577074] [2023-11-29 01:00:54,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:00:54,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:00:54,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:00:54,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:00:54,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:00:54,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 82 [2023-11-29 01:00:54,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 300 flow. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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 01:00:54,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:00:54,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 82 [2023-11-29 01:00:54,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:00:55,165 INFO L124 PetriNetUnfolderBase]: 3096/5066 cut-off events. [2023-11-29 01:00:55,165 INFO L125 PetriNetUnfolderBase]: For 497/497 co-relation queries the response was YES. [2023-11-29 01:00:55,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10304 conditions, 5066 events. 3096/5066 cut-off events. For 497/497 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 31467 event pairs, 2670 based on Foata normal form. 0/3706 useless extension candidates. Maximal degree in co-relation 10285. Up to 4168 conditions per place. [2023-11-29 01:00:55,187 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 52 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2023-11-29 01:00:55,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 81 transitions, 414 flow [2023-11-29 01:00:55,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:00:55,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 01:00:55,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 212 transitions. [2023-11-29 01:00:55,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2023-11-29 01:00:55,189 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 212 transitions. [2023-11-29 01:00:55,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 212 transitions. [2023-11-29 01:00:55,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:00:55,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 212 transitions. [2023-11-29 01:00:55,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 01:00:55,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 82.0) internal successors, (492), 6 states have internal predecessors, (492), 0 states have call successors, (0), 0 states 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 01:00:55,190 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 82.0) internal successors, (492), 6 states have internal predecessors, (492), 0 states have call successors, (0), 0 states 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 01:00:55,190 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 300 flow. Second operand 5 states and 212 transitions. [2023-11-29 01:00:55,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 81 transitions, 414 flow [2023-11-29 01:00:55,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 413 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:00:55,193 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 309 flow [2023-11-29 01:00:55,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=309, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2023-11-29 01:00:55,194 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 1 predicate places. [2023-11-29 01:00:55,194 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 309 flow [2023-11-29 01:00:55,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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 01:00:55,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:00:55,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:00:55,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:55,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:55,395 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:00:55,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:00:55,395 INFO L85 PathProgramCache]: Analyzing trace with hash 737635358, now seen corresponding path program 1 times [2023-11-29 01:00:55,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:00:55,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307155069] [2023-11-29 01:00:55,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:00:55,396 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 01:00:55,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:00:55,396 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:55,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:00:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:00:55,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:00:55,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:00:55,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 01:00:55,547 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 7 [2023-11-29 01:00:55,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,562 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 13 treesize of output 1 [2023-11-29 01:00:55,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,572 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 01:00:55,579 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 01:00:55,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,587 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 01:00:55,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,596 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 01:00:55,602 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 01:00:55,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,610 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 01:00:55,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,631 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 01:00:55,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,640 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 01:00:55,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,649 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 01:00:55,655 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 01:00:55,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,662 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 01:00:55,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,672 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 01:00:55,677 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 01:00:55,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,685 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 01:00:55,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,697 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 01:00:55,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 01:00:55,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 01:00:55,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,743 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 01:00:55,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,766 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 01:00:55,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,796 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 01:00:55,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,820 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 01:00:55,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,830 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 01:00:55,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,841 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 01:00:55,847 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 01:00:55,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,856 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 01:00:55,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 01:00:55,876 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 01:00:55,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:55,885 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 01:00:56,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:00:56,029 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 01:00:56,038 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 01:00:56,039 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 01:00:56,118 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 01:00:56,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:00:57,027 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 01:00:57,028 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:00:57,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307155069] [2023-11-29 01:00:57,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307155069] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:00:57,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:00:57,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 01:00:57,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124192537] [2023-11-29 01:00:57,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:00:57,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:00:57,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:00:57,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:00:57,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:00:59,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:01:01,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:01:04,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:01:09,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:01:13,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 82 [2023-11-29 01:01:13,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 309 flow. Second operand has 10 states, 10 states have (on average 33.6) internal successors, (336), 10 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:13,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:01:13,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 82 [2023-11-29 01:01:13,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:01:18,767 WARN L539 Checker$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 01:01:23,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:01:30,337 INFO L124 PetriNetUnfolderBase]: 7009/11726 cut-off events. [2023-11-29 01:01:30,337 INFO L125 PetriNetUnfolderBase]: For 1329/1329 co-relation queries the response was YES. [2023-11-29 01:01:30,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23191 conditions, 11726 events. 7009/11726 cut-off events. For 1329/1329 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 82890 event pairs, 6002 based on Foata normal form. 0/9259 useless extension candidates. Maximal degree in co-relation 23171. Up to 3923 conditions per place. [2023-11-29 01:01:30,388 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 113 selfloop transitions, 45 changer transitions 0/174 dead transitions. [2023-11-29 01:01:30,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 174 transitions, 961 flow [2023-11-29 01:01:30,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:01:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 01:01:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 580 transitions. [2023-11-29 01:01:30,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052264808362369 [2023-11-29 01:01:30,392 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 580 transitions. [2023-11-29 01:01:30,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 580 transitions. [2023-11-29 01:01:30,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:01:30,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 580 transitions. [2023-11-29 01:01:30,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 41.42857142857143) internal successors, (580), 14 states have internal predecessors, (580), 0 states have call successors, (0), 0 states 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 01:01:30,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 82.0) internal successors, (1230), 15 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 01:01:30,396 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 82.0) internal successors, (1230), 15 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 01:01:30,396 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 309 flow. Second operand 14 states and 580 transitions. [2023-11-29 01:01:30,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 174 transitions, 961 flow [2023-11-29 01:01:30,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 174 transitions, 933 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 01:01:30,401 INFO L231 Difference]: Finished difference. Result has 97 places, 106 transitions, 567 flow [2023-11-29 01:01:30,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=567, PETRI_PLACES=97, PETRI_TRANSITIONS=106} [2023-11-29 01:01:30,401 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 16 predicate places. [2023-11-29 01:01:30,401 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 106 transitions, 567 flow [2023-11-29 01:01:30,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.6) internal successors, (336), 10 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:30,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:01:30,402 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-29 01:01:30,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:01:30,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:01:30,602 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:01:30,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:01:30,603 INFO L85 PathProgramCache]: Analyzing trace with hash 504413767, now seen corresponding path program 2 times [2023-11-29 01:01:30,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:01:30,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045654542] [2023-11-29 01:01:30,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:01:30,603 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 01:01:30,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:01:30,604 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:01:30,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:01:30,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:01:30,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:01:30,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 01:01:30,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:01:30,708 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 01:01:30,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:30,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 01:01:30,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:30,736 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 01:01:30,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:30,758 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 01:01:30,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:30,770 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 01:01:30,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:30,777 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 01:01:30,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:30,787 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 01:01:30,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:30,798 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 01:01:30,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:30,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 01:01:30,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:30,818 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 01:01:30,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:30,840 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 01:01:30,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:30,851 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 01:01:30,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:30,888 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 01:01:30,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:30,909 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 01:01:30,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:30,933 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 01:01:30,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:30,944 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 01:01:30,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:30,966 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 01:01:30,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:30,979 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 01:01:30,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:30,992 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 01:01:30,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:30,999 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 01:01:31,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:31,022 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 01:01:31,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:31,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 01:01:31,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:31,046 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 01:01:31,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:01:31,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 01:01:31,378 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 01:01:31,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:01:32,182 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 01:01:32,182 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:01:32,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045654542] [2023-11-29 01:01:32,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045654542] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:01:32,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:01:32,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 01:01:32,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878207119] [2023-11-29 01:01:32,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:01:32,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:01:32,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:01:32,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:01:32,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:01:35,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 82 [2023-11-29 01:01:35,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 106 transitions, 567 flow. Second operand has 14 states, 14 states have (on average 35.57142857142857) internal successors, (498), 14 states have internal predecessors, (498), 0 states have call successors, (0), 0 states 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 01:01:35,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:01:35,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 82 [2023-11-29 01:01:35,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:01:39,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:01:42,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:01:46,145 WARN L539 Checker$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 01:01:47,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:01:51,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:01:55,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:01:56,896 INFO L124 PetriNetUnfolderBase]: 7058/11462 cut-off events. [2023-11-29 01:01:56,896 INFO L125 PetriNetUnfolderBase]: For 3947/3959 co-relation queries the response was YES. [2023-11-29 01:01:56,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24201 conditions, 11462 events. 7058/11462 cut-off events. For 3947/3959 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 78593 event pairs, 6002 based on Foata normal form. 26/9291 useless extension candidates. Maximal degree in co-relation 24176. Up to 9505 conditions per place. [2023-11-29 01:01:56,954 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 48 selfloop transitions, 103 changer transitions 0/167 dead transitions. [2023-11-29 01:01:56,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 167 transitions, 1305 flow [2023-11-29 01:01:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 01:01:56,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 01:01:56,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1031 transitions. [2023-11-29 01:01:56,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465672990063234 [2023-11-29 01:01:56,961 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1031 transitions. [2023-11-29 01:01:56,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1031 transitions. [2023-11-29 01:01:56,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:01:56,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1031 transitions. [2023-11-29 01:01:56,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 38.18518518518518) internal successors, (1031), 27 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states 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 01:01:56,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 82.0) internal successors, (2296), 28 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 01:01:56,971 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 82.0) internal successors, (2296), 28 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 01:01:56,971 INFO L175 Difference]: Start difference. First operand has 97 places, 106 transitions, 567 flow. Second operand 27 states and 1031 transitions. [2023-11-29 01:01:56,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 167 transitions, 1305 flow [2023-11-29 01:01:56,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 167 transitions, 1302 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:01:56,993 INFO L231 Difference]: Finished difference. Result has 130 places, 166 transitions, 1284 flow [2023-11-29 01:01:56,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1284, PETRI_PLACES=130, PETRI_TRANSITIONS=166} [2023-11-29 01:01:56,994 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 49 predicate places. [2023-11-29 01:01:56,994 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 166 transitions, 1284 flow [2023-11-29 01:01:56,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 35.57142857142857) internal successors, (498), 14 states have internal predecessors, (498), 0 states have call successors, (0), 0 states 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 01:01:56,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:01:56,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:01:56,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-11-29 01:01:57,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:01:57,195 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:01:57,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:01:57,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1411751480, now seen corresponding path program 1 times [2023-11-29 01:01:57,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:01:57,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233317463] [2023-11-29 01:01:57,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:01:57,196 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 01:01:57,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:01:57,197 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:01:57,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:01:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:01:57,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:01:57,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:01:57,336 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 01:01:57,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:01:57,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:01:57,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233317463] [2023-11-29 01:01:57,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233317463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:01:57,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:01:57,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:01:57,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655332619] [2023-11-29 01:01:57,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:01:57,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:01:57,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:01:57,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:01:57,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:01:57,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 82 [2023-11-29 01:01:57,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 166 transitions, 1284 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 01:01:57,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:01:57,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 82 [2023-11-29 01:01:57,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:01:58,729 INFO L124 PetriNetUnfolderBase]: 6647/10776 cut-off events. [2023-11-29 01:01:58,729 INFO L125 PetriNetUnfolderBase]: For 4179/4191 co-relation queries the response was YES. [2023-11-29 01:01:58,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23915 conditions, 10776 events. 6647/10776 cut-off events. For 4179/4191 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 72505 event pairs, 1977 based on Foata normal form. 242/9334 useless extension candidates. Maximal degree in co-relation 23881. Up to 8104 conditions per place. [2023-11-29 01:01:58,785 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 162 selfloop transitions, 3 changer transitions 0/183 dead transitions. [2023-11-29 01:01:58,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 183 transitions, 1666 flow [2023-11-29 01:01:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:01:58,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:01:58,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2023-11-29 01:01:58,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6747967479674797 [2023-11-29 01:01:58,786 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 166 transitions. [2023-11-29 01:01:58,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 166 transitions. [2023-11-29 01:01:58,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:01:58,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 166 transitions. [2023-11-29 01:01:58,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 01:01:58,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 01:01:58,788 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 01:01:58,788 INFO L175 Difference]: Start difference. First operand has 130 places, 166 transitions, 1284 flow. Second operand 3 states and 166 transitions. [2023-11-29 01:01:58,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 183 transitions, 1666 flow [2023-11-29 01:01:58,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 183 transitions, 1394 flow, removed 84 selfloop flow, removed 9 redundant places. [2023-11-29 01:01:58,820 INFO L231 Difference]: Finished difference. Result has 124 places, 168 transitions, 1037 flow [2023-11-29 01:01:58,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1037, PETRI_PLACES=124, PETRI_TRANSITIONS=168} [2023-11-29 01:01:58,820 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 43 predicate places. [2023-11-29 01:01:58,821 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 168 transitions, 1037 flow [2023-11-29 01:01:58,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 01:01:58,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:01:58,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:01:58,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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)] Forceful destruction successful, exit code 0 [2023-11-29 01:01:59,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:01:59,021 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:01:59,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:01:59,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1864092513, now seen corresponding path program 1 times [2023-11-29 01:01:59,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:01:59,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132814689] [2023-11-29 01:01:59,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:01:59,022 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 01:01:59,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:01:59,023 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:01:59,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:01:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:01:59,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:01:59,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:01:59,149 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 01:01:59,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:01:59,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:01:59,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132814689] [2023-11-29 01:01:59,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132814689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:01:59,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:01:59,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:01:59,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056800983] [2023-11-29 01:01:59,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:01:59,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:01:59,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:01:59,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:01:59,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:01:59,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 82 [2023-11-29 01:01:59,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 168 transitions, 1037 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 01:01:59,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:01:59,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 82 [2023-11-29 01:01:59,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:02:00,547 INFO L124 PetriNetUnfolderBase]: 6085/9880 cut-off events. [2023-11-29 01:02:00,547 INFO L125 PetriNetUnfolderBase]: For 7487/7499 co-relation queries the response was YES. [2023-11-29 01:02:00,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23683 conditions, 9880 events. 6085/9880 cut-off events. For 7487/7499 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 63227 event pairs, 2201 based on Foata normal form. 184/8423 useless extension candidates. Maximal degree in co-relation 23648. Up to 6311 conditions per place. [2023-11-29 01:02:00,594 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 164 selfloop transitions, 2 changer transitions 1/185 dead transitions. [2023-11-29 01:02:00,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 185 transitions, 1439 flow [2023-11-29 01:02:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:02:00,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:02:00,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2023-11-29 01:02:00,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6788617886178862 [2023-11-29 01:02:00,595 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2023-11-29 01:02:00,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2023-11-29 01:02:00,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:02:00,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2023-11-29 01:02:00,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 01:02:00,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 01:02:00,597 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 01:02:00,597 INFO L175 Difference]: Start difference. First operand has 124 places, 168 transitions, 1037 flow. Second operand 3 states and 167 transitions. [2023-11-29 01:02:00,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 185 transitions, 1439 flow [2023-11-29 01:02:00,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 185 transitions, 1436 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:02:00,617 INFO L231 Difference]: Finished difference. Result has 126 places, 168 transitions, 1041 flow [2023-11-29 01:02:00,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1041, PETRI_PLACES=126, PETRI_TRANSITIONS=168} [2023-11-29 01:02:00,617 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 45 predicate places. [2023-11-29 01:02:00,617 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 168 transitions, 1041 flow [2023-11-29 01:02:00,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 01:02:00,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:02:00,618 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:02:00,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:00,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:00,818 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:02:00,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:02:00,818 INFO L85 PathProgramCache]: Analyzing trace with hash 615919652, now seen corresponding path program 2 times [2023-11-29 01:02:00,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:02:00,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183060736] [2023-11-29 01:02:00,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:02:00,819 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 01:02:00,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:02:00,819 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:00,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:00,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:02:00,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:02:00,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:02:00,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:02:00,953 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 01:02:00,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:02:00,977 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 01:02:00,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:00,988 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 01:02:01,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,014 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 01:02:01,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,028 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 01:02:01,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,044 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 01:02:01,054 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 01:02:01,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,066 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 01:02:01,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,080 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 01:02:01,088 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 01:02:01,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 01:02:01,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,131 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 01:02:01,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,148 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 01:02:01,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,165 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 01:02:01,174 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 01:02:01,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,186 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 01:02:01,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,204 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 01:02:01,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,230 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 01:02:01,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,247 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 01:02:01,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,274 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 01:02:01,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,322 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 01:02:01,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,349 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 01:02:01,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,370 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 01:02:01,380 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 01:02:01,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,393 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 01:02:01,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,421 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 01:02:01,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 01:02:01,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,452 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 01:02:01,461 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 01:02:01,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,475 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 01:02:01,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:02:01,680 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 01:02:01,697 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 01:02:01,697 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 01:02:01,796 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 01:02:01,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:02:01,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:02:01,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183060736] [2023-11-29 01:02:01,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183060736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:02:01,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:02:01,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:02:01,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7876791] [2023-11-29 01:02:01,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:02:01,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:02:01,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:02:01,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:02:01,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:02:02,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 82 [2023-11-29 01:02:02,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 168 transitions, 1041 flow. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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 01:02:02,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:02:02,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 82 [2023-11-29 01:02:02,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:02:03,242 INFO L124 PetriNetUnfolderBase]: 5078/8359 cut-off events. [2023-11-29 01:02:03,242 INFO L125 PetriNetUnfolderBase]: For 7087/7087 co-relation queries the response was YES. [2023-11-29 01:02:03,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19861 conditions, 8359 events. 5078/8359 cut-off events. For 7087/7087 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 52137 event pairs, 3800 based on Foata normal form. 399/7671 useless extension candidates. Maximal degree in co-relation 19824. Up to 7242 conditions per place. [2023-11-29 01:02:03,281 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 135 selfloop transitions, 12 changer transitions 0/165 dead transitions. [2023-11-29 01:02:03,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 165 transitions, 1309 flow [2023-11-29 01:02:03,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:02:03,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:02:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 175 transitions. [2023-11-29 01:02:03,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2023-11-29 01:02:03,283 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 175 transitions. [2023-11-29 01:02:03,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 175 transitions. [2023-11-29 01:02:03,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:02:03,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 175 transitions. [2023-11-29 01:02:03,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:02:03,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 01:02:03,284 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 01:02:03,285 INFO L175 Difference]: Start difference. First operand has 126 places, 168 transitions, 1041 flow. Second operand 4 states and 175 transitions. [2023-11-29 01:02:03,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 165 transitions, 1309 flow [2023-11-29 01:02:03,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 165 transitions, 1255 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-29 01:02:03,293 INFO L231 Difference]: Finished difference. Result has 123 places, 165 transitions, 985 flow [2023-11-29 01:02:03,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=985, PETRI_PLACES=123, PETRI_TRANSITIONS=165} [2023-11-29 01:02:03,294 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 42 predicate places. [2023-11-29 01:02:03,294 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 165 transitions, 985 flow [2023-11-29 01:02:03,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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 01:02:03,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:02:03,294 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 01:02:03,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:03,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:03,494 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:02:03,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:02:03,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1629307624, now seen corresponding path program 1 times [2023-11-29 01:02:03,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:02:03,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047988862] [2023-11-29 01:02:03,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:02:03,495 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 01:02:03,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:02:03,496 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:03,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:02:03,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:02:03,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:02:03,593 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 01:02:03,644 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 01:02:03,644 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:02:03,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:02:03,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047988862] [2023-11-29 01:02:03,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047988862] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:02:03,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:02:03,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:02:03,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298023822] [2023-11-29 01:02:03,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:02:03,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:02:03,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:02:03,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:02:03,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:02:03,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 82 [2023-11-29 01:02:03,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 165 transitions, 985 flow. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 01:02:03,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:02:03,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 82 [2023-11-29 01:02:03,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:02:04,728 INFO L124 PetriNetUnfolderBase]: 3854/6571 cut-off events. [2023-11-29 01:02:04,728 INFO L125 PetriNetUnfolderBase]: For 1824/1824 co-relation queries the response was YES. [2023-11-29 01:02:04,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14561 conditions, 6571 events. 3854/6571 cut-off events. For 1824/1824 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 40999 event pairs, 2834 based on Foata normal form. 0/6108 useless extension candidates. Maximal degree in co-relation 14525. Up to 5427 conditions per place. [2023-11-29 01:02:04,761 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 131 selfloop transitions, 14 changer transitions 0/163 dead transitions. [2023-11-29 01:02:04,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 163 transitions, 1269 flow [2023-11-29 01:02:04,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:02:04,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:02:04,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 172 transitions. [2023-11-29 01:02:04,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2023-11-29 01:02:04,763 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 172 transitions. [2023-11-29 01:02:04,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 172 transitions. [2023-11-29 01:02:04,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:02:04,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 172 transitions. [2023-11-29 01:02:04,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 01:02:04,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 01:02:04,764 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 01:02:04,764 INFO L175 Difference]: Start difference. First operand has 123 places, 165 transitions, 985 flow. Second operand 4 states and 172 transitions. [2023-11-29 01:02:04,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 163 transitions, 1269 flow [2023-11-29 01:02:04,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 163 transitions, 1256 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:02:04,773 INFO L231 Difference]: Finished difference. Result has 122 places, 163 transitions, 994 flow [2023-11-29 01:02:04,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=994, PETRI_PLACES=122, PETRI_TRANSITIONS=163} [2023-11-29 01:02:04,774 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 41 predicate places. [2023-11-29 01:02:04,774 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 163 transitions, 994 flow [2023-11-29 01:02:04,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 01:02:04,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:02:04,775 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 01:02:04,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:04,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:04,975 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:02:04,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:02:04,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1629307625, now seen corresponding path program 1 times [2023-11-29 01:02:04,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:02:04,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182608705] [2023-11-29 01:02:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:02:04,976 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 01:02:04,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:02:04,977 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:04,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:02:05,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:02:05,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:02:05,189 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 01:02:05,189 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:02:05,189 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:02:05,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182608705] [2023-11-29 01:02:05,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182608705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:02:05,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:02:05,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:02:05,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321992815] [2023-11-29 01:02:05,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:02:05,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:02:05,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:02:05,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:02:05,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:02:05,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 82 [2023-11-29 01:02:05,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 163 transitions, 994 flow. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 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 01:02:05,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:02:05,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 82 [2023-11-29 01:02:05,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:02:06,368 INFO L124 PetriNetUnfolderBase]: 4577/8023 cut-off events. [2023-11-29 01:02:06,368 INFO L125 PetriNetUnfolderBase]: For 2310/2316 co-relation queries the response was YES. [2023-11-29 01:02:06,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17700 conditions, 8023 events. 4577/8023 cut-off events. For 2310/2316 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 53154 event pairs, 3440 based on Foata normal form. 192/7740 useless extension candidates. Maximal degree in co-relation 17664. Up to 5532 conditions per place. [2023-11-29 01:02:06,423 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 128 selfloop transitions, 15 changer transitions 20/181 dead transitions. [2023-11-29 01:02:06,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 181 transitions, 1374 flow [2023-11-29 01:02:06,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:02:06,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:02:06,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 199 transitions. [2023-11-29 01:02:06,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2023-11-29 01:02:06,424 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 199 transitions. [2023-11-29 01:02:06,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 199 transitions. [2023-11-29 01:02:06,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:02:06,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 199 transitions. [2023-11-29 01:02:06,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 01:02:06,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 01:02:06,426 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 01:02:06,426 INFO L175 Difference]: Start difference. First operand has 122 places, 163 transitions, 994 flow. Second operand 4 states and 199 transitions. [2023-11-29 01:02:06,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 181 transitions, 1374 flow [2023-11-29 01:02:06,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 181 transitions, 1359 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:02:06,436 INFO L231 Difference]: Finished difference. Result has 124 places, 161 transitions, 994 flow [2023-11-29 01:02:06,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=994, PETRI_PLACES=124, PETRI_TRANSITIONS=161} [2023-11-29 01:02:06,436 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 43 predicate places. [2023-11-29 01:02:06,436 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 161 transitions, 994 flow [2023-11-29 01:02:06,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 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 01:02:06,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:02:06,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:02:06,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:06,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:06,637 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:02:06,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:02:06,637 INFO L85 PathProgramCache]: Analyzing trace with hash -925726073, now seen corresponding path program 1 times [2023-11-29 01:02:06,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:02:06,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581758722] [2023-11-29 01:02:06,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:02:06,638 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 01:02:06,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:02:06,639 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:06,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:02:06,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:02:06,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:02:06,813 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 01:02:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:02:07,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:02:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:02:08,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:02:08,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581758722] [2023-11-29 01:02:08,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [581758722] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:02:08,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:02:08,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-29 01:02:08,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618807428] [2023-11-29 01:02:08,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:02:08,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:02:08,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:02:08,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:02:08,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:02:11,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 82 [2023-11-29 01:02:11,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 161 transitions, 994 flow. Second operand has 8 states, 8 states have (on average 37.375) internal successors, (299), 8 states have internal predecessors, (299), 0 states have call successors, (0), 0 states 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 01:02:11,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:02:11,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 82 [2023-11-29 01:02:11,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:02:16,447 INFO L124 PetriNetUnfolderBase]: 9325/16116 cut-off events. [2023-11-29 01:02:16,447 INFO L125 PetriNetUnfolderBase]: For 5032/5038 co-relation queries the response was YES. [2023-11-29 01:02:16,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35465 conditions, 16116 events. 9325/16116 cut-off events. For 5032/5038 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 117687 event pairs, 6846 based on Foata normal form. 582/15800 useless extension candidates. Maximal degree in co-relation 35429. Up to 5457 conditions per place. [2023-11-29 01:02:16,537 INFO L140 encePairwiseOnDemand]: 74/82 looper letters, 109 selfloop transitions, 92 changer transitions 0/217 dead transitions. [2023-11-29 01:02:16,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 217 transitions, 1564 flow [2023-11-29 01:02:16,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:02:16,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 01:02:16,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 372 transitions. [2023-11-29 01:02:16,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2023-11-29 01:02:16,540 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 372 transitions. [2023-11-29 01:02:16,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 372 transitions. [2023-11-29 01:02:16,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:02:16,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 372 transitions. [2023-11-29 01:02:16,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 46.5) internal successors, (372), 8 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 01:02:16,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states 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 01:02:16,543 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states 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 01:02:16,543 INFO L175 Difference]: Start difference. First operand has 124 places, 161 transitions, 994 flow. Second operand 8 states and 372 transitions. [2023-11-29 01:02:16,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 217 transitions, 1564 flow [2023-11-29 01:02:16,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 217 transitions, 1537 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-29 01:02:16,567 INFO L231 Difference]: Finished difference. Result has 128 places, 161 transitions, 1167 flow [2023-11-29 01:02:16,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1167, PETRI_PLACES=128, PETRI_TRANSITIONS=161} [2023-11-29 01:02:16,567 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 47 predicate places. [2023-11-29 01:02:16,568 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 161 transitions, 1167 flow [2023-11-29 01:02:16,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 37.375) internal successors, (299), 8 states have internal predecessors, (299), 0 states have call successors, (0), 0 states 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 01:02:16,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:02:16,568 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1] [2023-11-29 01:02:16,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:16,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:16,769 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:02:16,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:02:16,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1880139442, now seen corresponding path program 1 times [2023-11-29 01:02:16,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:02:16,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513376138] [2023-11-29 01:02:16,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:02:16,770 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 01:02:16,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:02:16,771 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:16,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:02:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:02:16,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:02:16,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:02:16,894 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 01:02:17,556 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 01:02:17,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:02:20,192 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 01:02:20,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:02:20,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513376138] [2023-11-29 01:02:20,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513376138] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:02:20,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:02:20,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2023-11-29 01:02:20,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327890507] [2023-11-29 01:02:20,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:02:20,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 01:02:20,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:02:20,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 01:02:20,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2023-11-29 01:02:29,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 82 [2023-11-29 01:02:29,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 161 transitions, 1167 flow. Second operand has 22 states, 22 states have (on average 35.77272727272727) internal successors, (787), 22 states have internal predecessors, (787), 0 states have call successors, (0), 0 states 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 01:02:29,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:02:29,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 82 [2023-11-29 01:02:29,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:02:41,334 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 01:02:44,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:02:45,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:02:48,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:02:52,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:02:55,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:02:58,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:03:01,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:03:08,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:03:11,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:03:12,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:03:16,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:03:18,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:03:21,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:03:28,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:03:29,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:03:31,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:03:33,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:03:40,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:03:42,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:03:48,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:03:54,064 INFO L124 PetriNetUnfolderBase]: 9362/16223 cut-off events. [2023-11-29 01:03:54,065 INFO L125 PetriNetUnfolderBase]: For 6832/6850 co-relation queries the response was YES. [2023-11-29 01:03:54,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36508 conditions, 16223 events. 9362/16223 cut-off events. For 6832/6850 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 118830 event pairs, 6846 based on Foata normal form. 41/15508 useless extension candidates. Maximal degree in co-relation 36473. Up to 13269 conditions per place. [2023-11-29 01:03:54,150 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 42 selfloop transitions, 174 changer transitions 0/232 dead transitions. [2023-11-29 01:03:54,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 232 transitions, 2225 flow [2023-11-29 01:03:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 01:03:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-29 01:03:54,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1712 transitions. [2023-11-29 01:03:54,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45387062566277836 [2023-11-29 01:03:54,155 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 1712 transitions. [2023-11-29 01:03:54,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 1712 transitions. [2023-11-29 01:03:54,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:03:54,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 1712 transitions. [2023-11-29 01:03:54,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 37.21739130434783) internal successors, (1712), 46 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states 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 01:03:54,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 82.0) internal successors, (3854), 47 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states 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 01:03:54,164 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 82.0) internal successors, (3854), 47 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states 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 01:03:54,164 INFO L175 Difference]: Start difference. First operand has 128 places, 161 transitions, 1167 flow. Second operand 46 states and 1712 transitions. [2023-11-29 01:03:54,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 232 transitions, 2225 flow [2023-11-29 01:03:54,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 232 transitions, 2199 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-29 01:03:54,188 INFO L231 Difference]: Finished difference. Result has 185 places, 232 transitions, 2227 flow [2023-11-29 01:03:54,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2227, PETRI_PLACES=185, PETRI_TRANSITIONS=232} [2023-11-29 01:03:54,189 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 104 predicate places. [2023-11-29 01:03:54,189 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 232 transitions, 2227 flow [2023-11-29 01:03:54,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 35.77272727272727) internal successors, (787), 22 states have internal predecessors, (787), 0 states have call successors, (0), 0 states 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 01:03:54,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:03:54,190 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:03:54,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:03:54,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:03:54,391 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:03:54,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:03:54,391 INFO L85 PathProgramCache]: Analyzing trace with hash 457000033, now seen corresponding path program 2 times [2023-11-29 01:03:54,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:03:54,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288057917] [2023-11-29 01:03:54,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:03:54,391 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 01:03:54,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:03:54,392 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:03:54,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:03:54,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:03:54,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:03:54,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 01:03:54,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:03:54,522 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 01:03:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 01:03:54,826 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:03:54,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:03:54,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288057917] [2023-11-29 01:03:54,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288057917] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:03:54,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:03:54,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:03:54,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646840926] [2023-11-29 01:03:54,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:03:54,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:03:54,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:03:54,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:03:54,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:03:55,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 82 [2023-11-29 01:03:55,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 232 transitions, 2227 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 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 01:03:55,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:03:55,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 82 [2023-11-29 01:03:55,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:03:57,127 INFO L124 PetriNetUnfolderBase]: 8300/14663 cut-off events. [2023-11-29 01:03:57,127 INFO L125 PetriNetUnfolderBase]: For 5531/5549 co-relation queries the response was YES. [2023-11-29 01:03:57,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32355 conditions, 14663 events. 8300/14663 cut-off events. For 5531/5549 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 108588 event pairs, 6018 based on Foata normal form. 426/14366 useless extension candidates. Maximal degree in co-relation 32305. Up to 11760 conditions per place. [2023-11-29 01:03:57,211 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 177 selfloop transitions, 35 changer transitions 0/230 dead transitions. [2023-11-29 01:03:57,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 230 transitions, 2637 flow [2023-11-29 01:03:57,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:03:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:03:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 178 transitions. [2023-11-29 01:03:57,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2023-11-29 01:03:57,213 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 178 transitions. [2023-11-29 01:03:57,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 178 transitions. [2023-11-29 01:03:57,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:03:57,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 178 transitions. [2023-11-29 01:03:57,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states 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 01:03:57,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 01:03:57,214 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 01:03:57,214 INFO L175 Difference]: Start difference. First operand has 185 places, 232 transitions, 2227 flow. Second operand 4 states and 178 transitions. [2023-11-29 01:03:57,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 230 transitions, 2637 flow [2023-11-29 01:03:57,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 230 transitions, 2227 flow, removed 104 selfloop flow, removed 21 redundant places. [2023-11-29 01:03:57,234 INFO L231 Difference]: Finished difference. Result has 165 places, 230 transitions, 1873 flow [2023-11-29 01:03:57,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1803, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1873, PETRI_PLACES=165, PETRI_TRANSITIONS=230} [2023-11-29 01:03:57,235 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 84 predicate places. [2023-11-29 01:03:57,235 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 230 transitions, 1873 flow [2023-11-29 01:03:57,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 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 01:03:57,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:03:57,235 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 15, 1, 1] [2023-11-29 01:03:57,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:03:57,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:03:57,436 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:03:57,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:03:57,436 INFO L85 PathProgramCache]: Analyzing trace with hash 2076644081, now seen corresponding path program 3 times [2023-11-29 01:03:57,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:03:57,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076073901] [2023-11-29 01:03:57,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:03:57,437 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 01:03:57,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:03:57,438 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:03:57,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:03:57,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-11-29 01:03:57,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:03:57,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 01:03:57,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:03:58,002 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 01:03:58,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,017 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 01:03:58,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 01:03:58,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,037 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 01:03:58,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,059 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 01:03:58,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,072 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 01:03:58,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,097 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 01:03:58,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,108 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 01:03:58,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 01:03:58,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,140 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 01:03:58,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,162 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 01:03:58,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,192 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 01:03:58,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,220 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 01:03:58,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,232 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 01:03:58,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,240 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 01:03:58,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,252 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 01:03:58,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,265 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 01:03:58,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,272 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 01:03:58,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,284 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 01:03:58,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,297 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 01:03:58,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,308 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 01:03:58,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,320 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 01:03:58,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,333 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 01:03:58,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:03:58,354 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 01:03:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:03:59,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:04:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:04:06,981 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:04:06,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076073901] [2023-11-29 01:04:06,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076073901] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:04:06,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:04:06,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2023-11-29 01:04:06,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740927770] [2023-11-29 01:04:06,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:04:06,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 01:04:06,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:04:06,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 01:04:06,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=932, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 01:04:35,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 82 [2023-11-29 01:04:35,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 230 transitions, 1873 flow. Second operand has 36 states, 36 states have (on average 35.833333333333336) internal successors, (1290), 36 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states 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 01:04:35,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:04:35,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 82 [2023-11-29 01:04:35,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:05:07,603 WARN L293 SmtUtils]: Spent 16.00s on a formula simplification. DAG size of input: 190 DAG size of output: 174 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:05:13,743 WARN L293 SmtUtils]: Spent 5.04s on a formula simplification that was a NOOP. DAG size: 182 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:05:28,996 WARN L293 SmtUtils]: Spent 14.27s on a formula simplification. DAG size of input: 178 DAG size of output: 163 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:05:33,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:05:35,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:05:38,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:05:42,932 WARN L539 Checker$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 01:05:46,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:05:50,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:05:54,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:05:57,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:06:01,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:06:05,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:06:09,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:06:13,150 WARN L539 Checker$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 01:06:17,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:06:21,156 WARN L539 Checker$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 01:06:25,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:06:32,515 WARN L293 SmtUtils]: Spent 5.61s on a formula simplification that was a NOOP. DAG size: 170 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:06:47,200 WARN L293 SmtUtils]: Spent 12.78s on a formula simplification. DAG size of input: 166 DAG size of output: 152 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:06:51,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:06:54,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:06:57,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:07:04,395 WARN L293 SmtUtils]: Spent 5.59s on a formula simplification that was a NOOP. DAG size: 158 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:07:15,977 WARN L293 SmtUtils]: Spent 9.83s on a formula simplification. DAG size of input: 154 DAG size of output: 141 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:07:19,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:07:23,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:07:34,715 WARN L293 SmtUtils]: Spent 6.97s on a formula simplification. DAG size of input: 143 DAG size of output: 131 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:07:38,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:07:41,866 WARN L539 Checker$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 01:07:53,183 WARN L293 SmtUtils]: Spent 5.86s on a formula simplification. DAG size of input: 131 DAG size of output: 120 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:07:57,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:08:01,303 WARN L539 Checker$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 01:08:13,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:08:23,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:08:31,665 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 01:08:46,075 INFO L124 PetriNetUnfolderBase]: 8353/14830 cut-off events. [2023-11-29 01:08:46,076 INFO L125 PetriNetUnfolderBase]: For 10910/10928 co-relation queries the response was YES. [2023-11-29 01:08:46,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33388 conditions, 14830 events. 8353/14830 cut-off events. For 10910/10928 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 109458 event pairs, 6018 based on Foata normal form. 29/14136 useless extension candidates. Maximal degree in co-relation 33341. Up to 11808 conditions per place. [2023-11-29 01:08:46,163 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 54 selfloop transitions, 272 changer transitions 0/342 dead transitions. [2023-11-29 01:08:46,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 342 transitions, 3686 flow [2023-11-29 01:08:46,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-29 01:08:46,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-11-29 01:08:46,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 2986 transitions. [2023-11-29 01:08:46,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495633845227341 [2023-11-29 01:08:46,169 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 2986 transitions. [2023-11-29 01:08:46,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 2986 transitions. [2023-11-29 01:08:46,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:08:46,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 2986 transitions. [2023-11-29 01:08:46,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 36.864197530864196) internal successors, (2986), 81 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states 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 01:08:46,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 82.0) internal successors, (6724), 82 states have internal predecessors, (6724), 0 states have call successors, (0), 0 states 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 01:08:46,183 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 82.0) internal successors, (6724), 82 states have internal predecessors, (6724), 0 states have call successors, (0), 0 states 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 01:08:46,183 INFO L175 Difference]: Start difference. First operand has 165 places, 230 transitions, 1873 flow. Second operand 81 states and 2986 transitions. [2023-11-29 01:08:46,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 342 transitions, 3686 flow [2023-11-29 01:08:46,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 342 transitions, 3593 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:08:46,211 INFO L231 Difference]: Finished difference. Result has 246 places, 327 transitions, 3416 flow [2023-11-29 01:08:46,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=3416, PETRI_PLACES=246, PETRI_TRANSITIONS=327} [2023-11-29 01:08:46,211 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 165 predicate places. [2023-11-29 01:08:46,211 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 327 transitions, 3416 flow [2023-11-29 01:08:46,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 35.833333333333336) internal successors, (1290), 36 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states 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 01:08:46,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:08:46,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:08:46,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:08:46,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:08:46,412 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:08:46,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:08:46,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1710424833, now seen corresponding path program 1 times [2023-11-29 01:08:46,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:08:46,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330203513] [2023-11-29 01:08:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:08:46,413 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 01:08:46,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:08:46,414 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:08:46,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:08:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:08:46,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:08:46,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:08:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:08:49,146 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:08:49,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:08:49,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330203513] [2023-11-29 01:08:49,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330203513] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:08:49,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:08:49,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 01:08:49,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204723191] [2023-11-29 01:08:49,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:08:49,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:08:49,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:08:49,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:08:49,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:08:51,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:08:51,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 82 [2023-11-29 01:08:51,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 327 transitions, 3416 flow. Second operand has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:08:51,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:08:51,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 82 [2023-11-29 01:08:51,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:08:59,527 INFO L124 PetriNetUnfolderBase]: 15274/24292 cut-off events. [2023-11-29 01:08:59,527 INFO L125 PetriNetUnfolderBase]: For 9709/9709 co-relation queries the response was YES. [2023-11-29 01:08:59,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56384 conditions, 24292 events. 15274/24292 cut-off events. For 9709/9709 co-relation queries the response was YES. Maximal size of possible extension queue 683. Compared 166487 event pairs, 3720 based on Foata normal form. 9/22654 useless extension candidates. Maximal degree in co-relation 56333. Up to 17551 conditions per place. [2023-11-29 01:08:59,705 INFO L140 encePairwiseOnDemand]: 68/82 looper letters, 350 selfloop transitions, 52 changer transitions 1/422 dead transitions. [2023-11-29 01:08:59,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 422 transitions, 4467 flow [2023-11-29 01:08:59,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:08:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 01:08:59,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 645 transitions. [2023-11-29 01:08:59,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4916158536585366 [2023-11-29 01:08:59,707 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 645 transitions. [2023-11-29 01:08:59,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 645 transitions. [2023-11-29 01:08:59,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:08:59,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 645 transitions. [2023-11-29 01:08:59,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 40.3125) internal successors, (645), 16 states have internal predecessors, (645), 0 states have call successors, (0), 0 states 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 01:08:59,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:08:59,710 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:08:59,710 INFO L175 Difference]: Start difference. First operand has 246 places, 327 transitions, 3416 flow. Second operand 16 states and 645 transitions. [2023-11-29 01:08:59,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 422 transitions, 4467 flow [2023-11-29 01:08:59,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 422 transitions, 3603 flow, removed 219 selfloop flow, removed 53 redundant places. [2023-11-29 01:08:59,750 INFO L231 Difference]: Finished difference. Result has 218 places, 348 transitions, 2779 flow [2023-11-29 01:08:59,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=2552, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2779, PETRI_PLACES=218, PETRI_TRANSITIONS=348} [2023-11-29 01:08:59,750 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 137 predicate places. [2023-11-29 01:08:59,751 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 348 transitions, 2779 flow [2023-11-29 01:08:59,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:08:59,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:08:59,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:08:59,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:08:59,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:08:59,952 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:08:59,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:08:59,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1317076401, now seen corresponding path program 2 times [2023-11-29 01:08:59,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:08:59,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130149058] [2023-11-29 01:08:59,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:08:59,952 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 01:08:59,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:08:59,953 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:08:59,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:09:00,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:09:00,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:09:00,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:09:00,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:09:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:09:02,693 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:09:02,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:09:02,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130149058] [2023-11-29 01:09:02,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130149058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:09:02,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:09:02,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 01:09:02,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347554062] [2023-11-29 01:09:02,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:09:02,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:09:02,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:09:02,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:09:02,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:09:07,018 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 [0] [2023-11-29 01:09:07,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 82 [2023-11-29 01:09:07,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 348 transitions, 2779 flow. Second operand has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:09:07,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:09:07,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 82 [2023-11-29 01:09:07,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:09:13,907 INFO L124 PetriNetUnfolderBase]: 17617/29236 cut-off events. [2023-11-29 01:09:13,907 INFO L125 PetriNetUnfolderBase]: For 41530/41566 co-relation queries the response was YES. [2023-11-29 01:09:14,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84341 conditions, 29236 events. 17617/29236 cut-off events. For 41530/41566 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 221291 event pairs, 6399 based on Foata normal form. 9/27217 useless extension candidates. Maximal degree in co-relation 84304. Up to 21934 conditions per place. [2023-11-29 01:09:14,270 INFO L140 encePairwiseOnDemand]: 68/82 looper letters, 348 selfloop transitions, 52 changer transitions 1/420 dead transitions. [2023-11-29 01:09:14,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 420 transitions, 3874 flow [2023-11-29 01:09:14,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:09:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 01:09:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 559 transitions. [2023-11-29 01:09:14,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48693379790940766 [2023-11-29 01:09:14,272 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 559 transitions. [2023-11-29 01:09:14,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 559 transitions. [2023-11-29 01:09:14,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:09:14,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 559 transitions. [2023-11-29 01:09:14,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 39.92857142857143) internal successors, (559), 14 states have internal predecessors, (559), 0 states have call successors, (0), 0 states 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 01:09:14,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 82.0) internal successors, (1230), 15 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 01:09:14,276 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 82.0) internal successors, (1230), 15 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 01:09:14,276 INFO L175 Difference]: Start difference. First operand has 218 places, 348 transitions, 2779 flow. Second operand 14 states and 559 transitions. [2023-11-29 01:09:14,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 420 transitions, 3874 flow [2023-11-29 01:09:14,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 420 transitions, 3795 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-29 01:09:14,534 INFO L231 Difference]: Finished difference. Result has 237 places, 368 transitions, 3015 flow [2023-11-29 01:09:14,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=2709, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3015, PETRI_PLACES=237, PETRI_TRANSITIONS=368} [2023-11-29 01:09:14,535 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 156 predicate places. [2023-11-29 01:09:14,535 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 368 transitions, 3015 flow [2023-11-29 01:09:14,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:09:14,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:09:14,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:09:14,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:09:14,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:09:14,736 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:09:14,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:09:14,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1669465207, now seen corresponding path program 3 times [2023-11-29 01:09:14,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:09:14,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882411899] [2023-11-29 01:09:14,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:09:14,737 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 01:09:14,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:09:14,738 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:09:14,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:09:14,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 01:09:14,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:09:14,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:09:14,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:09:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:09:17,214 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:09:17,214 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:09:17,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882411899] [2023-11-29 01:09:17,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882411899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:09:17,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:09:17,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 01:09:17,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126599221] [2023-11-29 01:09:17,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:09:17,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:09:17,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:09:17,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:09:17,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:09:21,557 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 [0] [2023-11-29 01:09:21,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 82 [2023-11-29 01:09:21,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 368 transitions, 3015 flow. Second operand has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:09:21,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:09:21,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 82 [2023-11-29 01:09:21,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:09:30,487 INFO L124 PetriNetUnfolderBase]: 19570/32617 cut-off events. [2023-11-29 01:09:30,488 INFO L125 PetriNetUnfolderBase]: For 68780/68780 co-relation queries the response was YES. [2023-11-29 01:09:30,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103403 conditions, 32617 events. 19570/32617 cut-off events. For 68780/68780 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 253986 event pairs, 6333 based on Foata normal form. 9/30286 useless extension candidates. Maximal degree in co-relation 103357. Up to 24229 conditions per place. [2023-11-29 01:09:30,757 INFO L140 encePairwiseOnDemand]: 68/82 looper letters, 362 selfloop transitions, 71 changer transitions 1/453 dead transitions. [2023-11-29 01:09:30,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 453 transitions, 4205 flow [2023-11-29 01:09:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:09:30,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 01:09:30,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 645 transitions. [2023-11-29 01:09:30,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4916158536585366 [2023-11-29 01:09:30,758 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 645 transitions. [2023-11-29 01:09:30,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 645 transitions. [2023-11-29 01:09:30,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:09:30,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 645 transitions. [2023-11-29 01:09:30,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 40.3125) internal successors, (645), 16 states have internal predecessors, (645), 0 states have call successors, (0), 0 states 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 01:09:30,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:09:30,761 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:09:30,761 INFO L175 Difference]: Start difference. First operand has 237 places, 368 transitions, 3015 flow. Second operand 16 states and 645 transitions. [2023-11-29 01:09:30,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 453 transitions, 4205 flow [2023-11-29 01:09:31,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 453 transitions, 4143 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-11-29 01:09:31,301 INFO L231 Difference]: Finished difference. Result has 255 places, 382 transitions, 3243 flow [2023-11-29 01:09:31,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3243, PETRI_PLACES=255, PETRI_TRANSITIONS=382} [2023-11-29 01:09:31,302 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 174 predicate places. [2023-11-29 01:09:31,302 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 382 transitions, 3243 flow [2023-11-29 01:09:31,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:09:31,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:09:31,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:09:31,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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)] Forceful destruction successful, exit code 0 [2023-11-29 01:09:31,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:09:31,503 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:09:31,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:09:31,503 INFO L85 PathProgramCache]: Analyzing trace with hash -270865945, now seen corresponding path program 4 times [2023-11-29 01:09:31,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:09:31,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996536801] [2023-11-29 01:09:31,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:09:31,504 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 01:09:31,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:09:31,505 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:09:31,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:09:31,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:09:31,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:09:31,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:09:31,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:09:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:09:34,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:09:34,319 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:09:34,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996536801] [2023-11-29 01:09:34,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996536801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:09:34,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:09:34,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 01:09:34,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566600815] [2023-11-29 01:09:34,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:09:34,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:09:34,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:09:34,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:09:34,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:09:34,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 82 [2023-11-29 01:09:34,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 382 transitions, 3243 flow. Second operand has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:09:34,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:09:34,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 82 [2023-11-29 01:09:34,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:09:46,126 INFO L124 PetriNetUnfolderBase]: 22189/37624 cut-off events. [2023-11-29 01:09:46,126 INFO L125 PetriNetUnfolderBase]: For 116480/116480 co-relation queries the response was YES. [2023-11-29 01:09:46,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127668 conditions, 37624 events. 22189/37624 cut-off events. For 116480/116480 co-relation queries the response was YES. Maximal size of possible extension queue 1234. Compared 308237 event pairs, 7032 based on Foata normal form. 9/34861 useless extension candidates. Maximal degree in co-relation 127617. Up to 26623 conditions per place. [2023-11-29 01:09:46,444 INFO L140 encePairwiseOnDemand]: 68/82 looper letters, 379 selfloop transitions, 77 changer transitions 1/476 dead transitions. [2023-11-29 01:09:46,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 476 transitions, 4530 flow [2023-11-29 01:09:46,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:09:46,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 01:09:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 660 transitions. [2023-11-29 01:09:46,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030487804878049 [2023-11-29 01:09:46,445 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 660 transitions. [2023-11-29 01:09:46,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 660 transitions. [2023-11-29 01:09:46,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:09:46,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 660 transitions. [2023-11-29 01:09:46,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 41.25) internal successors, (660), 16 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 01:09:46,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:09:46,448 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:09:46,448 INFO L175 Difference]: Start difference. First operand has 255 places, 382 transitions, 3243 flow. Second operand 16 states and 660 transitions. [2023-11-29 01:09:46,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 476 transitions, 4530 flow [2023-11-29 01:09:47,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 476 transitions, 4384 flow, removed 28 selfloop flow, removed 8 redundant places. [2023-11-29 01:09:47,472 INFO L231 Difference]: Finished difference. Result has 265 places, 391 transitions, 3380 flow [2023-11-29 01:09:47,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=3101, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3380, PETRI_PLACES=265, PETRI_TRANSITIONS=391} [2023-11-29 01:09:47,473 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 184 predicate places. [2023-11-29 01:09:47,473 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 391 transitions, 3380 flow [2023-11-29 01:09:47,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:09:47,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:09:47,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:09:47,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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)] Ended with exit code 0 [2023-11-29 01:09:47,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:09:47,674 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:09:47,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:09:47,674 INFO L85 PathProgramCache]: Analyzing trace with hash 173918925, now seen corresponding path program 5 times [2023-11-29 01:09:47,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:09:47,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283869164] [2023-11-29 01:09:47,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:09:47,675 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 01:09:47,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:09:47,675 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:09:47,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (28)] Waiting until timeout for monitored process [2023-11-29 01:09:47,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:09:47,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:09:47,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:09:47,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:09:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:09:50,051 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:09:50,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:09:50,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283869164] [2023-11-29 01:09:50,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283869164] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:09:50,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:09:50,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 01:09:50,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98346566] [2023-11-29 01:09:50,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:09:50,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:09:50,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:09:50,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:09:50,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:09:50,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 82 [2023-11-29 01:09:50,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 391 transitions, 3380 flow. Second operand has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:09:50,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:09:50,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 82 [2023-11-29 01:09:50,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:10:00,547 INFO L124 PetriNetUnfolderBase]: 23971/40792 cut-off events. [2023-11-29 01:10:00,547 INFO L125 PetriNetUnfolderBase]: For 164261/164261 co-relation queries the response was YES. [2023-11-29 01:10:00,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145753 conditions, 40792 events. 23971/40792 cut-off events. For 164261/164261 co-relation queries the response was YES. Maximal size of possible extension queue 1364. Compared 340256 event pairs, 8301 based on Foata normal form. 9/37696 useless extension candidates. Maximal degree in co-relation 145698. Up to 31600 conditions per place. [2023-11-29 01:10:00,939 INFO L140 encePairwiseOnDemand]: 68/82 looper letters, 383 selfloop transitions, 66 changer transitions 1/469 dead transitions. [2023-11-29 01:10:00,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 469 transitions, 4600 flow [2023-11-29 01:10:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:10:00,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 01:10:00,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 641 transitions. [2023-11-29 01:10:00,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4885670731707317 [2023-11-29 01:10:00,942 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 641 transitions. [2023-11-29 01:10:00,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 641 transitions. [2023-11-29 01:10:00,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:10:00,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 641 transitions. [2023-11-29 01:10:00,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 40.0625) internal successors, (641), 16 states have internal predecessors, (641), 0 states have call successors, (0), 0 states 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 01:10:00,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:10:00,945 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:10:00,945 INFO L175 Difference]: Start difference. First operand has 265 places, 391 transitions, 3380 flow. Second operand 16 states and 641 transitions. [2023-11-29 01:10:00,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 469 transitions, 4600 flow [2023-11-29 01:10:02,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 469 transitions, 4431 flow, removed 29 selfloop flow, removed 10 redundant places. [2023-11-29 01:10:03,002 INFO L231 Difference]: Finished difference. Result has 273 places, 401 transitions, 3487 flow [2023-11-29 01:10:03,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=3219, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3487, PETRI_PLACES=273, PETRI_TRANSITIONS=401} [2023-11-29 01:10:03,003 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 192 predicate places. [2023-11-29 01:10:03,003 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 401 transitions, 3487 flow [2023-11-29 01:10:03,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:10:03,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:10:03,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:10:03,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (28)] Ended with exit code 0 [2023-11-29 01:10:03,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:10:03,204 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:10:03,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:10:03,204 INFO L85 PathProgramCache]: Analyzing trace with hash 296607751, now seen corresponding path program 6 times [2023-11-29 01:10:03,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:10:03,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977345261] [2023-11-29 01:10:03,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:10:03,205 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 01:10:03,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:10:03,206 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:10:03,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (29)] Waiting until timeout for monitored process [2023-11-29 01:10:03,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-29 01:10:03,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:10:03,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:10:03,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:10:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:10:05,732 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:10:05,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:10:05,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977345261] [2023-11-29 01:10:05,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977345261] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:10:05,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:10:05,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 01:10:05,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021571943] [2023-11-29 01:10:05,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:10:05,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:10:05,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:10:05,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:10:05,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:10:06,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 82 [2023-11-29 01:10:06,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 401 transitions, 3487 flow. Second operand has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:10:06,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:10:06,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 82 [2023-11-29 01:10:06,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:10:16,891 INFO L124 PetriNetUnfolderBase]: 25591/43705 cut-off events. [2023-11-29 01:10:16,891 INFO L125 PetriNetUnfolderBase]: For 154169/154169 co-relation queries the response was YES. [2023-11-29 01:10:17,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153476 conditions, 43705 events. 25591/43705 cut-off events. For 154169/154169 co-relation queries the response was YES. Maximal size of possible extension queue 1504. Compared 370552 event pairs, 9312 based on Foata normal form. 9/40276 useless extension candidates. Maximal degree in co-relation 153417. Up to 34048 conditions per place. [2023-11-29 01:10:17,291 INFO L140 encePairwiseOnDemand]: 68/82 looper letters, 379 selfloop transitions, 74 changer transitions 1/473 dead transitions. [2023-11-29 01:10:17,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 473 transitions, 4650 flow [2023-11-29 01:10:17,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:10:17,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 01:10:17,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 643 transitions. [2023-11-29 01:10:17,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49009146341463417 [2023-11-29 01:10:17,292 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 643 transitions. [2023-11-29 01:10:17,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 643 transitions. [2023-11-29 01:10:17,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:10:17,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 643 transitions. [2023-11-29 01:10:17,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 40.1875) internal successors, (643), 16 states have internal predecessors, (643), 0 states have call successors, (0), 0 states 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 01:10:17,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:10:17,295 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:10:17,295 INFO L175 Difference]: Start difference. First operand has 273 places, 401 transitions, 3487 flow. Second operand 16 states and 643 transitions. [2023-11-29 01:10:17,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 473 transitions, 4650 flow [2023-11-29 01:10:19,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 473 transitions, 4481 flow, removed 36 selfloop flow, removed 9 redundant places. [2023-11-29 01:10:19,527 INFO L231 Difference]: Finished difference. Result has 280 places, 405 transitions, 3535 flow [2023-11-29 01:10:19,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=3326, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3535, PETRI_PLACES=280, PETRI_TRANSITIONS=405} [2023-11-29 01:10:19,528 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 199 predicate places. [2023-11-29 01:10:19,528 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 405 transitions, 3535 flow [2023-11-29 01:10:19,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:10:19,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:10:19,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:10:19,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (29)] Ended with exit code 0 [2023-11-29 01:10:19,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:10:19,729 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:10:19,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:10:19,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1452987759, now seen corresponding path program 7 times [2023-11-29 01:10:19,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:10:19,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684384067] [2023-11-29 01:10:19,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:10:19,730 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 01:10:19,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:10:19,731 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:10:19,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (30)] Waiting until timeout for monitored process [2023-11-29 01:10:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:10:19,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:10:19,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:10:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:10:22,702 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:10:22,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:10:22,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684384067] [2023-11-29 01:10:22,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684384067] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:10:22,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:10:22,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 01:10:22,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317159711] [2023-11-29 01:10:22,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:10:22,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:10:22,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:10:22,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:10:22,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:10:27,075 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 [0] [2023-11-29 01:10:27,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 82 [2023-11-29 01:10:27,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 405 transitions, 3535 flow. Second operand has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:10:27,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:10:27,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 82 [2023-11-29 01:10:27,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:10:38,959 INFO L124 PetriNetUnfolderBase]: 27544/47092 cut-off events. [2023-11-29 01:10:38,959 INFO L125 PetriNetUnfolderBase]: For 150419/150419 co-relation queries the response was YES. [2023-11-29 01:10:39,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164065 conditions, 47092 events. 27544/47092 cut-off events. For 150419/150419 co-relation queries the response was YES. Maximal size of possible extension queue 1670. Compared 406615 event pairs, 9705 based on Foata normal form. 9/43303 useless extension candidates. Maximal degree in co-relation 164004. Up to 36739 conditions per place. [2023-11-29 01:10:39,422 INFO L140 encePairwiseOnDemand]: 68/82 looper letters, 393 selfloop transitions, 74 changer transitions 1/487 dead transitions. [2023-11-29 01:10:39,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 487 transitions, 4778 flow [2023-11-29 01:10:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:10:39,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 01:10:39,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 651 transitions. [2023-11-29 01:10:39,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4961890243902439 [2023-11-29 01:10:39,424 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 651 transitions. [2023-11-29 01:10:39,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 651 transitions. [2023-11-29 01:10:39,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:10:39,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 651 transitions. [2023-11-29 01:10:39,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 40.6875) internal successors, (651), 16 states have internal predecessors, (651), 0 states have call successors, (0), 0 states 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 01:10:39,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:10:39,427 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:10:39,427 INFO L175 Difference]: Start difference. First operand has 280 places, 405 transitions, 3535 flow. Second operand 16 states and 651 transitions. [2023-11-29 01:10:39,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 487 transitions, 4778 flow [2023-11-29 01:10:40,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 487 transitions, 4638 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-11-29 01:10:40,445 INFO L231 Difference]: Finished difference. Result has 285 places, 411 transitions, 3639 flow [2023-11-29 01:10:40,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3639, PETRI_PLACES=285, PETRI_TRANSITIONS=411} [2023-11-29 01:10:40,446 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 204 predicate places. [2023-11-29 01:10:40,446 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 411 transitions, 3639 flow [2023-11-29 01:10:40,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:10:40,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:10:40,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:10:40,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (30)] Ended with exit code 0 [2023-11-29 01:10:40,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:10:40,647 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:10:40,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:10:40,648 INFO L85 PathProgramCache]: Analyzing trace with hash 814198399, now seen corresponding path program 8 times [2023-11-29 01:10:40,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:10:40,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966081679] [2023-11-29 01:10:40,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:10:40,648 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 01:10:40,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:10:40,649 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:10:40,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (31)] Waiting until timeout for monitored process [2023-11-29 01:10:40,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:10:40,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:10:40,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:10:40,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:10:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:10:43,057 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:10:43,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:10:43,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966081679] [2023-11-29 01:10:43,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966081679] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:10:43,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:10:43,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 01:10:43,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841405779] [2023-11-29 01:10:43,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:10:43,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:10:43,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:10:43,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:10:43,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:10:47,303 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 [0] [2023-11-29 01:10:47,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 82 [2023-11-29 01:10:47,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 411 transitions, 3639 flow. Second operand has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:10:47,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:10:47,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 82 [2023-11-29 01:10:47,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:10:58,847 INFO L124 PetriNetUnfolderBase]: 29164/50026 cut-off events. [2023-11-29 01:10:58,847 INFO L125 PetriNetUnfolderBase]: For 175187/175187 co-relation queries the response was YES. [2023-11-29 01:10:59,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177082 conditions, 50026 events. 29164/50026 cut-off events. For 175187/175187 co-relation queries the response was YES. Maximal size of possible extension queue 1817. Compared 437860 event pairs, 10860 based on Foata normal form. 9/45904 useless extension candidates. Maximal degree in co-relation 177018. Up to 40087 conditions per place. [2023-11-29 01:10:59,489 INFO L140 encePairwiseOnDemand]: 68/82 looper letters, 395 selfloop transitions, 66 changer transitions 1/481 dead transitions. [2023-11-29 01:10:59,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 481 transitions, 4821 flow [2023-11-29 01:10:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:10:59,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 01:10:59,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 639 transitions. [2023-11-29 01:10:59,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4870426829268293 [2023-11-29 01:10:59,491 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 639 transitions. [2023-11-29 01:10:59,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 639 transitions. [2023-11-29 01:10:59,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:10:59,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 639 transitions. [2023-11-29 01:10:59,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 39.9375) internal successors, (639), 16 states have internal predecessors, (639), 0 states have call successors, (0), 0 states 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 01:10:59,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:10:59,493 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:10:59,494 INFO L175 Difference]: Start difference. First operand has 285 places, 411 transitions, 3639 flow. Second operand 16 states and 639 transitions. [2023-11-29 01:10:59,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 481 transitions, 4821 flow [2023-11-29 01:11:00,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 481 transitions, 4672 flow, removed 18 selfloop flow, removed 11 redundant places. [2023-11-29 01:11:00,693 INFO L231 Difference]: Finished difference. Result has 290 places, 415 transitions, 3699 flow [2023-11-29 01:11:00,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=3490, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3699, PETRI_PLACES=290, PETRI_TRANSITIONS=415} [2023-11-29 01:11:00,694 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 209 predicate places. [2023-11-29 01:11:00,695 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 415 transitions, 3699 flow [2023-11-29 01:11:00,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:11:00,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:11:00,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:11:00,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (31)] Ended with exit code 0 [2023-11-29 01:11:00,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:11:00,895 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:11:00,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:11:00,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1240416735, now seen corresponding path program 9 times [2023-11-29 01:11:00,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:11:00,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716961042] [2023-11-29 01:11:00,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:11:00,896 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 01:11:00,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:11:00,897 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:11:00,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (32)] Waiting until timeout for monitored process [2023-11-29 01:11:01,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 01:11:01,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:11:01,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:11:01,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:11:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:11:03,538 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:11:03,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:11:03,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716961042] [2023-11-29 01:11:03,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716961042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:11:03,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:11:03,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 01:11:03,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416513668] [2023-11-29 01:11:03,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:11:03,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:11:03,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:11:03,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:11:03,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:11:07,952 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 [0] [2023-11-29 01:11:08,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 82 [2023-11-29 01:11:08,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 415 transitions, 3699 flow. Second operand has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:11:08,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:11:08,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 82 [2023-11-29 01:11:08,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:11:21,377 INFO L124 PetriNetUnfolderBase]: 31117/53464 cut-off events. [2023-11-29 01:11:21,377 INFO L125 PetriNetUnfolderBase]: For 203222/203222 co-relation queries the response was YES. [2023-11-29 01:11:21,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191619 conditions, 53464 events. 31117/53464 cut-off events. For 203222/203222 co-relation queries the response was YES. Maximal size of possible extension queue 1995. Compared 476202 event pairs, 11280 based on Foata normal form. 9/48982 useless extension candidates. Maximal degree in co-relation 191553. Up to 42778 conditions per place. [2023-11-29 01:11:21,905 INFO L140 encePairwiseOnDemand]: 68/82 looper letters, 409 selfloop transitions, 66 changer transitions 1/495 dead transitions. [2023-11-29 01:11:21,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 495 transitions, 4973 flow [2023-11-29 01:11:21,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:11:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 01:11:21,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 647 transitions. [2023-11-29 01:11:21,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49314024390243905 [2023-11-29 01:11:21,907 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 647 transitions. [2023-11-29 01:11:21,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 647 transitions. [2023-11-29 01:11:21,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:11:21,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 647 transitions. [2023-11-29 01:11:21,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 40.4375) internal successors, (647), 16 states have internal predecessors, (647), 0 states have call successors, (0), 0 states 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 01:11:21,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:11:21,909 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:11:21,909 INFO L175 Difference]: Start difference. First operand has 290 places, 415 transitions, 3699 flow. Second operand 16 states and 647 transitions. [2023-11-29 01:11:21,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 495 transitions, 4973 flow [2023-11-29 01:11:23,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 495 transitions, 4836 flow, removed 16 selfloop flow, removed 12 redundant places. [2023-11-29 01:11:23,270 INFO L231 Difference]: Finished difference. Result has 295 places, 421 transitions, 3810 flow [2023-11-29 01:11:23,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=3562, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3810, PETRI_PLACES=295, PETRI_TRANSITIONS=421} [2023-11-29 01:11:23,271 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 214 predicate places. [2023-11-29 01:11:23,271 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 421 transitions, 3810 flow [2023-11-29 01:11:23,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:11:23,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:11:23,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:11:23,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (32)] Ended with exit code 0 [2023-11-29 01:11:23,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:11:23,472 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:11:23,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:11:23,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1959884243, now seen corresponding path program 10 times [2023-11-29 01:11:23,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:11:23,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031396020] [2023-11-29 01:11:23,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:11:23,473 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 01:11:23,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:11:23,474 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:11:23,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (33)] Waiting until timeout for monitored process [2023-11-29 01:11:23,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:11:23,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:11:23,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:11:23,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:11:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:11:25,846 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:11:25,846 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:11:25,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031396020] [2023-11-29 01:11:25,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031396020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:11:25,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:11:25,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 01:11:25,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499040929] [2023-11-29 01:11:25,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:11:25,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:11:25,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:11:25,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:11:25,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:11:30,178 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 [0] [2023-11-29 01:11:30,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 82 [2023-11-29 01:11:30,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 421 transitions, 3810 flow. Second operand has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:11:30,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:11:30,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 82 [2023-11-29 01:11:30,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:11:44,009 INFO L124 PetriNetUnfolderBase]: 32836/56656 cut-off events. [2023-11-29 01:11:44,009 INFO L125 PetriNetUnfolderBase]: For 240164/240164 co-relation queries the response was YES. [2023-11-29 01:11:44,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206370 conditions, 56656 events. 32836/56656 cut-off events. For 240164/240164 co-relation queries the response was YES. Maximal size of possible extension queue 2160. Compared 511711 event pairs, 12372 based on Foata normal form. 9/51841 useless extension candidates. Maximal degree in co-relation 206301. Up to 46153 conditions per place. [2023-11-29 01:11:44,764 INFO L140 encePairwiseOnDemand]: 68/82 looper letters, 411 selfloop transitions, 63 changer transitions 1/494 dead transitions. [2023-11-29 01:11:44,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 494 transitions, 5078 flow [2023-11-29 01:11:44,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:11:44,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 01:11:44,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 639 transitions. [2023-11-29 01:11:44,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4870426829268293 [2023-11-29 01:11:44,767 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 639 transitions. [2023-11-29 01:11:44,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 639 transitions. [2023-11-29 01:11:44,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:11:44,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 639 transitions. [2023-11-29 01:11:44,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 39.9375) internal successors, (639), 16 states have internal predecessors, (639), 0 states have call successors, (0), 0 states 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 01:11:44,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:11:44,769 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:11:44,769 INFO L175 Difference]: Start difference. First operand has 295 places, 421 transitions, 3810 flow. Second operand 16 states and 639 transitions. [2023-11-29 01:11:44,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 494 transitions, 5078 flow [2023-11-29 01:11:46,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 494 transitions, 4928 flow, removed 24 selfloop flow, removed 11 redundant places. [2023-11-29 01:11:46,293 INFO L231 Difference]: Finished difference. Result has 300 places, 427 transitions, 3919 flow [2023-11-29 01:11:46,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=3660, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3919, PETRI_PLACES=300, PETRI_TRANSITIONS=427} [2023-11-29 01:11:46,294 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 219 predicate places. [2023-11-29 01:11:46,294 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 427 transitions, 3919 flow [2023-11-29 01:11:46,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:11:46,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:11:46,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:11:46,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (33)] Ended with exit code 0 [2023-11-29 01:11:46,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:11:46,495 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:11:46,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:11:46,495 INFO L85 PathProgramCache]: Analyzing trace with hash -444951593, now seen corresponding path program 11 times [2023-11-29 01:11:46,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:11:46,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919739899] [2023-11-29 01:11:46,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:11:46,496 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 01:11:46,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:11:46,497 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:11:46,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (34)] Waiting until timeout for monitored process [2023-11-29 01:11:46,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:11:46,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:11:46,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:11:46,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:11:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:11:48,715 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:11:48,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:11:48,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919739899] [2023-11-29 01:11:48,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919739899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:11:48,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:11:48,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 01:11:48,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997838952] [2023-11-29 01:11:48,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:11:48,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:11:48,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:11:48,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:11:48,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:11:53,019 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 [0] [2023-11-29 01:11:53,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 82 [2023-11-29 01:11:53,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 427 transitions, 3919 flow. Second operand has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:11:53,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:11:53,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 82 [2023-11-29 01:11:53,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:12:06,932 INFO L124 PetriNetUnfolderBase]: 34456/59539 cut-off events. [2023-11-29 01:12:06,932 INFO L125 PetriNetUnfolderBase]: For 273980/273980 co-relation queries the response was YES. [2023-11-29 01:12:07,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218579 conditions, 59539 events. 34456/59539 cut-off events. For 273980/273980 co-relation queries the response was YES. Maximal size of possible extension queue 2299. Compared 542806 event pairs, 13782 based on Foata normal form. 9/54382 useless extension candidates. Maximal degree in co-relation 218508. Up to 48862 conditions per place. [2023-11-29 01:12:07,552 INFO L140 encePairwiseOnDemand]: 68/82 looper letters, 413 selfloop transitions, 63 changer transitions 1/496 dead transitions. [2023-11-29 01:12:07,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 496 transitions, 5152 flow [2023-11-29 01:12:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:12:07,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 01:12:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 637 transitions. [2023-11-29 01:12:07,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48551829268292684 [2023-11-29 01:12:07,553 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 637 transitions. [2023-11-29 01:12:07,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 637 transitions. [2023-11-29 01:12:07,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:12:07,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 637 transitions. [2023-11-29 01:12:07,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 39.8125) internal successors, (637), 16 states have internal predecessors, (637), 0 states have call successors, (0), 0 states 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 01:12:07,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:12:07,556 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 82.0) internal successors, (1394), 17 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 01:12:07,556 INFO L175 Difference]: Start difference. First operand has 300 places, 427 transitions, 3919 flow. Second operand 16 states and 637 transitions. [2023-11-29 01:12:07,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 496 transitions, 5152 flow [2023-11-29 01:12:09,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 496 transitions, 4979 flow, removed 38 selfloop flow, removed 11 redundant places. [2023-11-29 01:12:09,086 INFO L231 Difference]: Finished difference. Result has 305 places, 431 transitions, 3973 flow [2023-11-29 01:12:09,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=3746, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3973, PETRI_PLACES=305, PETRI_TRANSITIONS=431} [2023-11-29 01:12:09,087 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 224 predicate places. [2023-11-29 01:12:09,087 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 431 transitions, 3973 flow [2023-11-29 01:12:09,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:12:09,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:12:09,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:12:09,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (34)] Ended with exit code 0 [2023-11-29 01:12:09,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:12:09,288 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:12:09,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:12:09,289 INFO L85 PathProgramCache]: Analyzing trace with hash -650659547, now seen corresponding path program 12 times [2023-11-29 01:12:09,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:12:09,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258671564] [2023-11-29 01:12:09,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:12:09,289 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 01:12:09,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:12:09,290 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:12:09,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (35)] Waiting until timeout for monitored process [2023-11-29 01:12:09,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-29 01:12:09,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:12:09,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:12:09,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:12:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:12:11,780 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:12:11,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:12:11,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258671564] [2023-11-29 01:12:11,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258671564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:12:11,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:12:11,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 01:12:11,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922048883] [2023-11-29 01:12:11,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:12:11,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:12:11,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:12:11,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:12:11,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:12:16,129 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 [0] [2023-11-29 01:12:16,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 82 [2023-11-29 01:12:16,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 431 transitions, 3973 flow. Second operand has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:12:16,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:12:16,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 82 [2023-11-29 01:12:16,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:12:30,958 INFO L124 PetriNetUnfolderBase]: 36634/63427 cut-off events. [2023-11-29 01:12:30,958 INFO L125 PetriNetUnfolderBase]: For 329348/329411 co-relation queries the response was YES. [2023-11-29 01:12:31,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237202 conditions, 63427 events. 36634/63427 cut-off events. For 329348/329411 co-relation queries the response was YES. Maximal size of possible extension queue 2479. Compared 588067 event pairs, 18444 based on Foata normal form. 9/57928 useless extension candidates. Maximal degree in co-relation 237129. Up to 52399 conditions per place. [2023-11-29 01:12:31,626 INFO L140 encePairwiseOnDemand]: 68/82 looper letters, 428 selfloop transitions, 70 changer transitions 1/518 dead transitions. [2023-11-29 01:12:31,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 518 transitions, 5500 flow [2023-11-29 01:12:31,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 01:12:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 01:12:31,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 677 transitions. [2023-11-29 01:12:31,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48565279770444764 [2023-11-29 01:12:31,628 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 677 transitions. [2023-11-29 01:12:31,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 677 transitions. [2023-11-29 01:12:31,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:12:31,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 677 transitions. [2023-11-29 01:12:31,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 39.8235294117647) internal successors, (677), 17 states have internal predecessors, (677), 0 states have call successors, (0), 0 states 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 01:12:31,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 82.0) internal successors, (1476), 18 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states 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 01:12:31,631 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 82.0) internal successors, (1476), 18 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states 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 01:12:31,631 INFO L175 Difference]: Start difference. First operand has 305 places, 431 transitions, 3973 flow. Second operand 17 states and 677 transitions. [2023-11-29 01:12:31,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 518 transitions, 5500 flow [2023-11-29 01:12:33,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 518 transitions, 5356 flow, removed 22 selfloop flow, removed 12 redundant places. [2023-11-29 01:12:33,215 INFO L231 Difference]: Finished difference. Result has 313 places, 451 transitions, 4331 flow [2023-11-29 01:12:33,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=3829, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4331, PETRI_PLACES=313, PETRI_TRANSITIONS=451} [2023-11-29 01:12:33,216 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 232 predicate places. [2023-11-29 01:12:33,216 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 451 transitions, 4331 flow [2023-11-29 01:12:33,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:12:33,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:12:33,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:12:33,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (35)] Ended with exit code 0 [2023-11-29 01:12:33,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:12:33,417 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:12:33,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:12:33,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1085955649, now seen corresponding path program 13 times [2023-11-29 01:12:33,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:12:33,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768291347] [2023-11-29 01:12:33,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:12:33,418 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 01:12:33,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:12:33,419 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:12:33,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (36)] Waiting until timeout for monitored process [2023-11-29 01:12:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:12:33,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:12:33,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:12:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:12:36,019 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:12:36,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:12:36,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768291347] [2023-11-29 01:12:36,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768291347] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:12:36,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:12:36,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 01:12:36,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911855163] [2023-11-29 01:12:36,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:12:36,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:12:36,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:12:36,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:12:36,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:12:40,369 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 [0] [2023-11-29 01:12:40,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 82 [2023-11-29 01:12:40,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 451 transitions, 4331 flow. Second operand has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:12:40,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:12:40,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 82 [2023-11-29 01:12:40,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:12:57,147 INFO L124 PetriNetUnfolderBase]: 38722/67216 cut-off events. [2023-11-29 01:12:57,147 INFO L125 PetriNetUnfolderBase]: For 456734/456797 co-relation queries the response was YES. [2023-11-29 01:12:57,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267240 conditions, 67216 events. 38722/67216 cut-off events. For 456734/456797 co-relation queries the response was YES. Maximal size of possible extension queue 2657. Compared 630560 event pairs, 19353 based on Foata normal form. 9/61384 useless extension candidates. Maximal degree in co-relation 267162. Up to 55702 conditions per place. [2023-11-29 01:12:57,907 INFO L140 encePairwiseOnDemand]: 68/82 looper letters, 439 selfloop transitions, 85 changer transitions 1/544 dead transitions. [2023-11-29 01:12:57,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 544 transitions, 6136 flow [2023-11-29 01:12:57,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 01:12:57,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 01:12:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 714 transitions. [2023-11-29 01:12:57,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483739837398374 [2023-11-29 01:12:57,909 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 714 transitions. [2023-11-29 01:12:57,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 714 transitions. [2023-11-29 01:12:57,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:12:57,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 714 transitions. [2023-11-29 01:12:57,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 39.666666666666664) internal successors, (714), 18 states have internal predecessors, (714), 0 states have call successors, (0), 0 states 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 01:12:57,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states 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 01:12:57,913 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states 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 01:12:57,913 INFO L175 Difference]: Start difference. First operand has 313 places, 451 transitions, 4331 flow. Second operand 18 states and 714 transitions. [2023-11-29 01:12:57,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 544 transitions, 6136 flow [2023-11-29 01:13:00,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 544 transitions, 5848 flow, removed 102 selfloop flow, removed 7 redundant places. [2023-11-29 01:13:00,364 INFO L231 Difference]: Finished difference. Result has 325 places, 479 transitions, 4829 flow [2023-11-29 01:13:00,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=4051, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4829, PETRI_PLACES=325, PETRI_TRANSITIONS=479} [2023-11-29 01:13:00,365 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 244 predicate places. [2023-11-29 01:13:00,365 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 479 transitions, 4829 flow [2023-11-29 01:13:00,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:13:00,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:13:00,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:13:00,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (36)] Ended with exit code 0 [2023-11-29 01:13:00,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:13:00,566 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:13:00,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:00,567 INFO L85 PathProgramCache]: Analyzing trace with hash 882980941, now seen corresponding path program 14 times [2023-11-29 01:13:00,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:13:00,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096226612] [2023-11-29 01:13:00,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:13:00,567 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 01:13:00,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:13:00,568 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:13:00,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (37)] Waiting until timeout for monitored process [2023-11-29 01:13:00,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:13:00,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:13:00,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:13:00,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:13:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:13:03,116 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:13:03,117 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:13:03,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096226612] [2023-11-29 01:13:03,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096226612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:13:03,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:13:03,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 01:13:03,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778489826] [2023-11-29 01:13:03,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:13:03,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:13:03,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:13:03,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:13:03,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:13:07,551 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 [0] [2023-11-29 01:13:07,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 82 [2023-11-29 01:13:07,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 479 transitions, 4829 flow. Second operand has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:13:07,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:13:07,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 82 [2023-11-29 01:13:07,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:13:27,350 INFO L124 PetriNetUnfolderBase]: 42097/73174 cut-off events. [2023-11-29 01:13:27,350 INFO L125 PetriNetUnfolderBase]: For 566372/566507 co-relation queries the response was YES. [2023-11-29 01:13:27,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302208 conditions, 73174 events. 42097/73174 cut-off events. For 566372/566507 co-relation queries the response was YES. Maximal size of possible extension queue 2911. Compared 695949 event pairs, 19941 based on Foata normal form. 9/66865 useless extension candidates. Maximal degree in co-relation 302127. Up to 59014 conditions per place. [2023-11-29 01:13:28,257 INFO L140 encePairwiseOnDemand]: 68/82 looper letters, 470 selfloop transitions, 88 changer transitions 1/578 dead transitions. [2023-11-29 01:13:28,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 578 transitions, 6580 flow [2023-11-29 01:13:28,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 01:13:28,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 01:13:28,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 734 transitions. [2023-11-29 01:13:28,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.497289972899729 [2023-11-29 01:13:28,260 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 734 transitions. [2023-11-29 01:13:28,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 734 transitions. [2023-11-29 01:13:28,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:13:28,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 734 transitions. [2023-11-29 01:13:28,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 40.77777777777778) internal successors, (734), 18 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 01:13:28,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states 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 01:13:28,262 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states 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 01:13:28,263 INFO L175 Difference]: Start difference. First operand has 325 places, 479 transitions, 4829 flow. Second operand 18 states and 734 transitions. [2023-11-29 01:13:28,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 578 transitions, 6580 flow [2023-11-29 01:13:33,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 578 transitions, 6151 flow, removed 151 selfloop flow, removed 10 redundant places. [2023-11-29 01:13:33,074 INFO L231 Difference]: Finished difference. Result has 335 places, 494 transitions, 4982 flow [2023-11-29 01:13:33,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=4413, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4982, PETRI_PLACES=335, PETRI_TRANSITIONS=494} [2023-11-29 01:13:33,075 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 254 predicate places. [2023-11-29 01:13:33,075 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 494 transitions, 4982 flow [2023-11-29 01:13:33,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:13:33,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:13:33,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:13:33,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (37)] Ended with exit code 0 [2023-11-29 01:13:33,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:13:33,276 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:13:33,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:33,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2069496811, now seen corresponding path program 15 times [2023-11-29 01:13:33,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:13:33,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139267811] [2023-11-29 01:13:33,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:13:33,277 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 01:13:33,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:13:33,278 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:13:33,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (38)] Waiting until timeout for monitored process [2023-11-29 01:13:33,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 01:13:33,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:13:33,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:13:33,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:13:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:13:36,157 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:13:36,157 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:13:36,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139267811] [2023-11-29 01:13:36,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139267811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:13:36,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:13:36,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 01:13:36,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816075346] [2023-11-29 01:13:36,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:13:36,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:13:36,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:13:36,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:13:36,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:13:36,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 82 [2023-11-29 01:13:36,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 494 transitions, 4982 flow. Second operand has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:13:36,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:13:36,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 82 [2023-11-29 01:13:36,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:13:45,041 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 [0] [2023-11-29 01:14:01,064 INFO L124 PetriNetUnfolderBase]: 44311/77035 cut-off events. [2023-11-29 01:14:01,064 INFO L125 PetriNetUnfolderBase]: For 633811/633964 co-relation queries the response was YES. [2023-11-29 01:14:01,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323667 conditions, 77035 events. 44311/77035 cut-off events. For 633811/633964 co-relation queries the response was YES. Maximal size of possible extension queue 3086. Compared 738449 event pairs, 20496 based on Foata normal form. 9/70348 useless extension candidates. Maximal degree in co-relation 323583. Up to 63595 conditions per place. [2023-11-29 01:14:02,107 INFO L140 encePairwiseOnDemand]: 68/82 looper letters, 473 selfloop transitions, 90 changer transitions 1/583 dead transitions. [2023-11-29 01:14:02,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 583 transitions, 6643 flow [2023-11-29 01:14:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 01:14:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 01:14:02,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 729 transitions. [2023-11-29 01:14:02,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49390243902439024 [2023-11-29 01:14:02,110 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 729 transitions. [2023-11-29 01:14:02,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 729 transitions. [2023-11-29 01:14:02,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:14:02,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 729 transitions. [2023-11-29 01:14:02,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 40.5) internal successors, (729), 18 states have internal predecessors, (729), 0 states have call successors, (0), 0 states 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 01:14:02,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states 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 01:14:02,113 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states 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 01:14:02,113 INFO L175 Difference]: Start difference. First operand has 335 places, 494 transitions, 4982 flow. Second operand 18 states and 729 transitions. [2023-11-29 01:14:02,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 583 transitions, 6643 flow [2023-11-29 01:14:08,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 583 transitions, 6305 flow, removed 116 selfloop flow, removed 10 redundant places. [2023-11-29 01:14:08,538 INFO L231 Difference]: Finished difference. Result has 345 places, 505 transitions, 5138 flow [2023-11-29 01:14:08,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=4680, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5138, PETRI_PLACES=345, PETRI_TRANSITIONS=505} [2023-11-29 01:14:08,539 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 264 predicate places. [2023-11-29 01:14:08,539 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 505 transitions, 5138 flow [2023-11-29 01:14:08,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:14:08,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:14:08,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:14:08,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (38)] Forceful destruction successful, exit code 0 [2023-11-29 01:14:08,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:14:08,740 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:14:08,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:14:08,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1019274805, now seen corresponding path program 16 times [2023-11-29 01:14:08,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 01:14:08,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304833546] [2023-11-29 01:14:08,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:14:08,741 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 01:14:08,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 01:14:08,742 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 01:14:08,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804aafad-2259-469d-8261-d3689f17b8c5/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 (39)] Waiting until timeout for monitored process [2023-11-29 01:14:08,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:14:08,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:14:08,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:14:08,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:14:11,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:14:11,368 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:14:11,368 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 01:14:11,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304833546] [2023-11-29 01:14:11,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304833546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:14:11,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:14:11,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 01:14:11,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409298793] [2023-11-29 01:14:11,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:14:11,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:14:11,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 01:14:11,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:14:11,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:14:11,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 82 [2023-11-29 01:14:11,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 505 transitions, 5138 flow. Second operand has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 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 01:14:11,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:14:11,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 82 [2023-11-29 01:14:11,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand