./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.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_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:39:10,515 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:39:10,597 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:39:10,603 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:39:10,603 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:39:10,628 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:39:10,629 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:39:10,629 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:39:10,630 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:39:10,631 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:39:10,632 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:39:10,632 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:39:10,633 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:39:10,634 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:39:10,634 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:39:10,635 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:39:10,635 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:39:10,636 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:39:10,636 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:39:10,637 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:39:10,637 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:39:10,638 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:39:10,638 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:39:10,639 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:39:10,639 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:39:10,640 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:39:10,640 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:39:10,641 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:39:10,641 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:39:10,642 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:39:10,642 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:39:10,643 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:39:10,643 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:39:10,644 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:39:10,644 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:39:10,644 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:39:10,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:39:10,645 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:39:10,646 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:39:10,646 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:39:10,646 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:39:10,647 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_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b [2023-11-24 21:39:10,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:39:10,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:39:10,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:39:10,995 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:39:10,996 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:39:10,997 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2023-11-24 21:39:14,155 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:39:14,366 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:39:14,367 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2023-11-24 21:39:14,376 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/data/e359d6f66/153a3a8afca64f9db48c7c859f90da7c/FLAGa4d3405b3 [2023-11-24 21:39:14,722 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/data/e359d6f66/153a3a8afca64f9db48c7c859f90da7c [2023-11-24 21:39:14,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:39:14,726 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:39:14,728 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:39:14,728 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:39:14,734 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:39:14,735 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:39:14" (1/1) ... [2023-11-24 21:39:14,736 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2882af14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:14, skipping insertion in model container [2023-11-24 21:39:14,736 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:39:14" (1/1) ... [2023-11-24 21:39:14,768 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:39:15,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:39:15,036 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-24 21:39:15,037 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@23089f7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:15, skipping insertion in model container [2023-11-24 21:39:15,037 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:39:15,038 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-24 21:39:15,039 INFO L158 Benchmark]: Toolchain (without parser) took 312.21ms. Allocated memory is still 199.2MB. Free memory was 155.0MB in the beginning and 144.9MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-24 21:39:15,040 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 117.4MB. Free memory was 65.4MB in the beginning and 65.3MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:39:15,041 INFO L158 Benchmark]: CACSL2BoogieTranslator took 309.70ms. Allocated memory is still 199.2MB. Free memory was 154.6MB in the beginning and 144.9MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-24 21:39:15,042 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 117.4MB. Free memory was 65.4MB in the beginning and 65.3MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 309.70ms. Allocated memory is still 199.2MB. Free memory was 154.6MB in the beginning and 144.9MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: 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_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:39:17,593 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:39:17,718 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-24 21:39:17,727 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:39:17,728 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:39:17,791 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:39:17,792 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:39:17,793 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:39:17,794 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:39:17,799 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:39:17,799 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:39:17,800 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:39:17,801 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:39:17,803 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:39:17,803 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:39:17,803 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:39:17,804 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:39:17,804 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:39:17,805 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:39:17,806 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:39:17,806 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:39:17,807 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:39:17,807 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:39:17,808 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:39:17,808 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:39:17,809 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 21:39:17,809 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 21:39:17,809 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:39:17,810 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:39:17,810 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:39:17,812 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:39:17,812 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:39:17,812 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:39:17,813 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:39:17,813 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:39:17,813 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:39:17,813 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:39:17,813 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-24 21:39:17,814 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 21:39:17,814 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:39:17,814 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:39:17,814 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:39:17,815 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:39:17,815 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-24 21:39:17,815 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_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b [2023-11-24 21:39:18,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:39:18,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:39:18,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:39:18,282 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:39:18,283 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:39:18,284 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2023-11-24 21:39:21,551 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:39:21,848 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:39:21,849 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2023-11-24 21:39:21,860 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/data/a39c189f3/260887015fb84814b6389fb7320632da/FLAG52ba750ef [2023-11-24 21:39:21,878 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/data/a39c189f3/260887015fb84814b6389fb7320632da [2023-11-24 21:39:21,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:39:21,885 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:39:21,888 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:39:21,888 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:39:21,893 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:39:21,894 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:39:21" (1/1) ... [2023-11-24 21:39:21,895 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bbc000c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:21, skipping insertion in model container [2023-11-24 21:39:21,895 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:39:21" (1/1) ... [2023-11-24 21:39:21,928 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:39:22,185 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:39:22,199 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-24 21:39:22,204 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:39:22,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:39:22,229 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:39:22,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:39:22,267 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:39:22,267 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:39:22,275 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:39:22,275 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:22 WrapperNode [2023-11-24 21:39:22,275 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:39:22,276 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:39:22,277 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:39:22,277 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:39:22,284 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:22" (1/1) ... [2023-11-24 21:39:22,296 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:22" (1/1) ... [2023-11-24 21:39:22,328 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 12, calls inlined = 14, statements flattened = 196 [2023-11-24 21:39:22,329 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:39:22,330 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:39:22,330 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:39:22,330 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:39:22,342 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:22" (1/1) ... [2023-11-24 21:39:22,342 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:22" (1/1) ... [2023-11-24 21:39:22,348 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:22" (1/1) ... [2023-11-24 21:39:22,369 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 2, 2, 8]. 57 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 2]. [2023-11-24 21:39:22,369 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:22" (1/1) ... [2023-11-24 21:39:22,370 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:22" (1/1) ... [2023-11-24 21:39:22,396 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:22" (1/1) ... [2023-11-24 21:39:22,413 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:22" (1/1) ... [2023-11-24 21:39:22,416 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:22" (1/1) ... [2023-11-24 21:39:22,418 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:22" (1/1) ... [2023-11-24 21:39:22,423 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:39:22,424 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:39:22,424 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:39:22,424 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:39:22,425 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:22" (1/1) ... [2023-11-24 21:39:22,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:39:22,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:39:22,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:39:22,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:39:22,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:39:22,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-24 21:39:22,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-24 21:39:22,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-24 21:39:22,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-24 21:39:22,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:39:22,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-24 21:39:22,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-24 21:39:22,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-24 21:39:22,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-24 21:39:22,516 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:39:22,516 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:39:22,516 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:39:22,516 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:39:22,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:39:22,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:39:22,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:39:22,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:39:22,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:39:22,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:39:22,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-24 21:39:22,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-24 21:39:22,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-24 21:39:22,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-24 21:39:22,520 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:39:22,679 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:39:22,681 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:39:23,397 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:39:23,888 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:39:23,888 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 21:39:23,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:39:23 BoogieIcfgContainer [2023-11-24 21:39:23,889 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:39:23,891 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:39:23,891 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:39:23,894 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:39:23,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:39:21" (1/3) ... [2023-11-24 21:39:23,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377566fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:39:23, skipping insertion in model container [2023-11-24 21:39:23,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:22" (2/3) ... [2023-11-24 21:39:23,897 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377566fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:39:23, skipping insertion in model container [2023-11-24 21:39:23,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:39:23" (3/3) ... [2023-11-24 21:39:23,899 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2023-11-24 21:39:23,919 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:39:23,919 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-24 21:39:23,919 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:39:24,010 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:39:24,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 146 flow [2023-11-24 21:39:24,122 INFO L124 PetriNetUnfolderBase]: 5/64 cut-off events. [2023-11-24 21:39:24,122 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:39:24,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 64 events. 5/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 173 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2023-11-24 21:39:24,129 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 146 flow [2023-11-24 21:39:24,133 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 63 transitions, 138 flow [2023-11-24 21:39:24,151 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:39:24,159 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;@1dd2627c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:39:24,160 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-11-24 21:39:24,168 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:39:24,168 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-24 21:39:24,168 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:39:24,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:24,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:39:24,170 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:39:24,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:24,176 INFO L85 PathProgramCache]: Analyzing trace with hash 590919, now seen corresponding path program 1 times [2023-11-24 21:39:24,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:24,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810974755] [2023-11-24 21:39:24,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:24,190 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:39:24,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:24,195 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:39:24,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-24 21:39:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:24,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:39:24,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:24,426 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 [2023-11-24 21:39:24,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:24,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:39:24,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:24,451 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 [2023-11-24 21:39:24,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:24,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:39:24,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:24,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:39:24,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:24,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:39:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:24,506 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:39:24,506 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:24,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810974755] [2023-11-24 21:39:24,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810974755] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:24,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:24,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:39:24,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813975973] [2023-11-24 21:39:24,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:24,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:39:24,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:24,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:39:24,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:39:24,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2023-11-24 21:39:24,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:24,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:24,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2023-11-24 21:39:24,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:25,043 INFO L124 PetriNetUnfolderBase]: 299/671 cut-off events. [2023-11-24 21:39:25,043 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-24 21:39:25,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1152 conditions, 671 events. 299/671 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4120 event pairs, 171 based on Foata normal form. 1/383 useless extension candidates. Maximal degree in co-relation 1057. Up to 443 conditions per place. [2023-11-24 21:39:25,054 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 28 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-11-24 21:39:25,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 190 flow [2023-11-24 21:39:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:39:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:39:25,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-24 21:39:25,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2023-11-24 21:39:25,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-24 21:39:25,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-24 21:39:25,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:25,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-24 21:39:25,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:25,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:25,082 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:25,084 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 138 flow. Second operand 3 states and 129 transitions. [2023-11-24 21:39:25,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 190 flow [2023-11-24 21:39:25,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 182 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:39:25,091 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 126 flow [2023-11-24 21:39:25,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2023-11-24 21:39:25,097 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -6 predicate places. [2023-11-24 21:39:25,098 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 126 flow [2023-11-24 21:39:25,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:25,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:25,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:39:25,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:39:25,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:39:25,301 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:39:25,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:25,302 INFO L85 PathProgramCache]: Analyzing trace with hash 590920, now seen corresponding path program 1 times [2023-11-24 21:39:25,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:25,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122855224] [2023-11-24 21:39:25,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:25,303 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:39:25,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:25,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:39:25,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-24 21:39:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:25,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:39:25,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:25,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-24 21:39:25,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:25,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:39:25,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:25,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:39:25,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:25,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:39:25,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:25,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:39:25,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:25,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:39:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:25,579 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:39:25,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:25,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122855224] [2023-11-24 21:39:25,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122855224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:25,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:25,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:39:25,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62466476] [2023-11-24 21:39:25,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:25,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:39:25,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:25,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:39:25,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:39:25,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2023-11-24 21:39:25,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:25,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:25,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2023-11-24 21:39:25,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:26,316 INFO L124 PetriNetUnfolderBase]: 301/677 cut-off events. [2023-11-24 21:39:26,316 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-24 21:39:26,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 677 events. 301/677 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4147 event pairs, 171 based on Foata normal form. 0/386 useless extension candidates. Maximal degree in co-relation 1114. Up to 452 conditions per place. [2023-11-24 21:39:26,336 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 31 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2023-11-24 21:39:26,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 65 transitions, 216 flow [2023-11-24 21:39:26,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:39:26,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:39:26,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 168 transitions. [2023-11-24 21:39:26,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2023-11-24 21:39:26,340 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 168 transitions. [2023-11-24 21:39:26,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 168 transitions. [2023-11-24 21:39:26,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:26,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 168 transitions. [2023-11-24 21:39:26,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:26,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:26,348 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:26,349 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 126 flow. Second operand 4 states and 168 transitions. [2023-11-24 21:39:26,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 65 transitions, 216 flow [2023-11-24 21:39:26,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 65 transitions, 210 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:39:26,356 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 178 flow [2023-11-24 21:39:26,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2023-11-24 21:39:26,357 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -2 predicate places. [2023-11-24 21:39:26,357 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 178 flow [2023-11-24 21:39:26,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:26,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:26,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-24 21:39:26,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:39:26,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:39:26,561 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:39:26,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:26,561 INFO L85 PathProgramCache]: Analyzing trace with hash 18319253, now seen corresponding path program 1 times [2023-11-24 21:39:26,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:26,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575521342] [2023-11-24 21:39:26,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:26,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:39:26,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:26,565 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:39:26,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-24 21:39:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:26,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:39:26,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:26,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:39:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:26,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:39:26,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:26,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575521342] [2023-11-24 21:39:26,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575521342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:26,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:26,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:39:26,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155240418] [2023-11-24 21:39:26,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:26,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:39:26,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:26,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:39:26,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:39:26,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 66 [2023-11-24 21:39:26,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:26,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:26,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 66 [2023-11-24 21:39:26,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:27,159 INFO L124 PetriNetUnfolderBase]: 291/611 cut-off events. [2023-11-24 21:39:27,160 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-24 21:39:27,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1094 conditions, 611 events. 291/611 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3442 event pairs, 171 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 1050. Up to 434 conditions per place. [2023-11-24 21:39:27,166 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 33 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-11-24 21:39:27,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 61 transitions, 242 flow [2023-11-24 21:39:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:39:27,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:39:27,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2023-11-24 21:39:27,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553030303030303 [2023-11-24 21:39:27,169 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 146 transitions. [2023-11-24 21:39:27,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 146 transitions. [2023-11-24 21:39:27,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:27,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 146 transitions. [2023-11-24 21:39:27,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 36.5) internal successors, (146), 4 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) [2023-11-24 21:39:27,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:27,172 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:27,172 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 178 flow. Second operand 4 states and 146 transitions. [2023-11-24 21:39:27,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 61 transitions, 242 flow [2023-11-24 21:39:27,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 61 transitions, 242 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:39:27,177 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 176 flow [2023-11-24 21:39:27,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2023-11-24 21:39:27,179 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-11-24 21:39:27,179 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 176 flow [2023-11-24 21:39:27,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:27,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:27,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-24 21:39:27,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:39:27,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:39:27,383 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:39:27,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:27,383 INFO L85 PathProgramCache]: Analyzing trace with hash 18319254, now seen corresponding path program 1 times [2023-11-24 21:39:27,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:27,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092780244] [2023-11-24 21:39:27,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:27,385 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:39:27,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:27,386 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:39:27,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-24 21:39:27,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:27,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:39:27,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:27,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-24 21:39:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:27,567 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:39:27,567 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:27,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092780244] [2023-11-24 21:39:27,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092780244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:27,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:27,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:39:27,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318203463] [2023-11-24 21:39:27,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:27,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:39:27,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:27,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:39:27,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:39:27,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2023-11-24 21:39:27,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:27,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:27,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2023-11-24 21:39:27,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:28,221 INFO L124 PetriNetUnfolderBase]: 275/607 cut-off events. [2023-11-24 21:39:28,221 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-24 21:39:28,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1062 conditions, 607 events. 275/607 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3574 event pairs, 153 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 1016. Up to 403 conditions per place. [2023-11-24 21:39:28,228 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 31 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-11-24 21:39:28,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 60 transitions, 244 flow [2023-11-24 21:39:28,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:39:28,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:39:28,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 162 transitions. [2023-11-24 21:39:28,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2023-11-24 21:39:28,232 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 162 transitions. [2023-11-24 21:39:28,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 162 transitions. [2023-11-24 21:39:28,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:28,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 162 transitions. [2023-11-24 21:39:28,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:28,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:28,236 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:28,236 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 176 flow. Second operand 4 states and 162 transitions. [2023-11-24 21:39:28,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 60 transitions, 244 flow [2023-11-24 21:39:28,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 60 transitions, 240 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:39:28,240 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 178 flow [2023-11-24 21:39:28,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2023-11-24 21:39:28,242 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-11-24 21:39:28,242 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 178 flow [2023-11-24 21:39:28,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:28,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:28,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:39:28,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:39:28,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:39:28,449 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:39:28,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:28,450 INFO L85 PathProgramCache]: Analyzing trace with hash 567897458, now seen corresponding path program 1 times [2023-11-24 21:39:28,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:28,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710284687] [2023-11-24 21:39:28,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:28,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:39:28,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:28,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:39:28,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-24 21:39:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:28,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:39:28,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:28,605 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:39:28,606 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:28,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710284687] [2023-11-24 21:39:28,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1710284687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:28,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:28,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:39:28,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701631869] [2023-11-24 21:39:28,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:28,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:39:28,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:28,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:39:28,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:39:28,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 66 [2023-11-24 21:39:28,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 178 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) [2023-11-24 21:39:28,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:28,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 66 [2023-11-24 21:39:28,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:28,941 INFO L124 PetriNetUnfolderBase]: 274/606 cut-off events. [2023-11-24 21:39:28,941 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-24 21:39:28,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1059 conditions, 606 events. 274/606 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3559 event pairs, 153 based on Foata normal form. 1/370 useless extension candidates. Maximal degree in co-relation 1016. Up to 411 conditions per place. [2023-11-24 21:39:28,947 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 31 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-11-24 21:39:28,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 59 transitions, 237 flow [2023-11-24 21:39:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:39:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:39:28,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 134 transitions. [2023-11-24 21:39:28,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6767676767676768 [2023-11-24 21:39:28,949 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 134 transitions. [2023-11-24 21:39:28,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 134 transitions. [2023-11-24 21:39:28,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:28,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 134 transitions. [2023-11-24 21:39:28,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:28,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:28,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:28,952 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 178 flow. Second operand 3 states and 134 transitions. [2023-11-24 21:39:28,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 59 transitions, 237 flow [2023-11-24 21:39:28,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 59 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:39:28,955 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 170 flow [2023-11-24 21:39:28,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2023-11-24 21:39:28,956 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-11-24 21:39:28,956 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 170 flow [2023-11-24 21:39:28,957 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) [2023-11-24 21:39:28,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:28,957 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-24 21:39:28,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:39:29,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:39:29,160 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:39:29,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:29,160 INFO L85 PathProgramCache]: Analyzing trace with hash 567893245, now seen corresponding path program 1 times [2023-11-24 21:39:29,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:29,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248012762] [2023-11-24 21:39:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:29,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:39:29,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:29,163 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:39:29,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-24 21:39:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:29,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:39:29,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:29,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-24 21:39:29,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:29,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:39:29,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:29,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:39:29,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:29,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:39:29,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:29,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:39:29,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:29,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:39:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:29,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:39:30,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:30,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:30,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248012762] [2023-11-24 21:39:30,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248012762] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:39:30,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:39:30,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:39:30,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650494666] [2023-11-24 21:39:30,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:39:30,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:39:30,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:30,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:39:30,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:39:31,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2023-11-24 21:39:31,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 170 flow. Second operand has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:31,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:31,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2023-11-24 21:39:31,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:33,415 INFO L124 PetriNetUnfolderBase]: 280/624 cut-off events. [2023-11-24 21:39:33,416 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-24 21:39:33,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1128 conditions, 624 events. 280/624 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3594 event pairs, 153 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 1050. Up to 414 conditions per place. [2023-11-24 21:39:33,422 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 30 selfloop transitions, 24 changer transitions 0/77 dead transitions. [2023-11-24 21:39:33,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 77 transitions, 368 flow [2023-11-24 21:39:33,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:39:33,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:39:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 380 transitions. [2023-11-24 21:39:33,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2023-11-24 21:39:33,426 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 380 transitions. [2023-11-24 21:39:33,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 380 transitions. [2023-11-24 21:39:33,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:33,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 380 transitions. [2023-11-24 21:39:33,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 38.0) internal successors, (380), 10 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:33,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:33,431 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:33,431 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 170 flow. Second operand 10 states and 380 transitions. [2023-11-24 21:39:33,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 77 transitions, 368 flow [2023-11-24 21:39:33,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 77 transitions, 362 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:39:33,435 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 336 flow [2023-11-24 21:39:33,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=336, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2023-11-24 21:39:33,436 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 8 predicate places. [2023-11-24 21:39:33,436 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 336 flow [2023-11-24 21:39:33,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:33,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:33,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:33,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:39:33,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:39:33,639 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:39:33,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:33,639 INFO L85 PathProgramCache]: Analyzing trace with hash 288696349, now seen corresponding path program 1 times [2023-11-24 21:39:33,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:33,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637133212] [2023-11-24 21:39:33,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:33,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:39:33,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:33,641 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:39:33,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-24 21:39:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:33,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:39:33,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:33,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:33,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:33,858 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 [2023-11-24 21:39:33,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:33,915 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-24 21:39:33,916 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 [2023-11-24 21:39:33,998 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:39:33,999 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 [2023-11-24 21:39:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:39:34,075 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:39:34,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:34,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637133212] [2023-11-24 21:39:34,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637133212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:34,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:34,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:39:34,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232948700] [2023-11-24 21:39:34,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:34,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:39:34,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:34,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:39:34,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:39:34,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2023-11-24 21:39:34,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 336 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:34,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:34,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2023-11-24 21:39:34,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:34,417 INFO L124 PetriNetUnfolderBase]: 280/603 cut-off events. [2023-11-24 21:39:34,417 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-24 21:39:34,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1148 conditions, 603 events. 280/603 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3372 event pairs, 153 based on Foata normal form. 55/441 useless extension candidates. Maximal degree in co-relation 1083. Up to 431 conditions per place. [2023-11-24 21:39:34,423 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 51 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-11-24 21:39:34,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 75 transitions, 436 flow [2023-11-24 21:39:34,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:39:34,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:39:34,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2023-11-24 21:39:34,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6414141414141414 [2023-11-24 21:39:34,425 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 127 transitions. [2023-11-24 21:39:34,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 127 transitions. [2023-11-24 21:39:34,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:34,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 127 transitions. [2023-11-24 21:39:34,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:34,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:34,427 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:34,427 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 336 flow. Second operand 3 states and 127 transitions. [2023-11-24 21:39:34,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 75 transitions, 436 flow [2023-11-24 21:39:34,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 75 transitions, 375 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-11-24 21:39:34,432 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 273 flow [2023-11-24 21:39:34,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2023-11-24 21:39:34,433 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2023-11-24 21:39:34,433 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 273 flow [2023-11-24 21:39:34,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:34,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:34,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:34,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:39:34,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:39:34,637 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:39:34,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:34,638 INFO L85 PathProgramCache]: Analyzing trace with hash 288696350, now seen corresponding path program 1 times [2023-11-24 21:39:34,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:34,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921215760] [2023-11-24 21:39:34,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:34,638 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 [2023-11-24 21:39:34,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:34,640 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:39:34,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-24 21:39:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:34,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-24 21:39:34,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:34,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:34,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-24 21:39:34,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:34,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-24 21:39:34,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:34,872 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 [2023-11-24 21:39:34,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-24 21:39:34,976 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:39:34,977 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 [2023-11-24 21:39:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:35,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:39:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:35,959 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:35,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921215760] [2023-11-24 21:39:35,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921215760] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:39:35,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:39:35,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-11-24 21:39:35,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718719909] [2023-11-24 21:39:35,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:39:35,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:39:35,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:35,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:39:35,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:39:41,523 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, 1] [2023-11-24 21:39:45,886 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, 1] [2023-11-24 21:39:45,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 66 [2023-11-24 21:39:45,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 273 flow. Second operand has 11 states, 11 states have (on average 29.272727272727273) internal successors, (322), 11 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:45,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:45,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 66 [2023-11-24 21:39:45,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:47,483 INFO L124 PetriNetUnfolderBase]: 938/1667 cut-off events. [2023-11-24 21:39:47,483 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-24 21:39:47,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3135 conditions, 1667 events. 938/1667 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 10477 event pairs, 550 based on Foata normal form. 0/1060 useless extension candidates. Maximal degree in co-relation 3122. Up to 680 conditions per place. [2023-11-24 21:39:47,501 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 68 selfloop transitions, 13 changer transitions 0/98 dead transitions. [2023-11-24 21:39:47,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 98 transitions, 485 flow [2023-11-24 21:39:47,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:39:47,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:39:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 353 transitions. [2023-11-24 21:39:47,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348484848484848 [2023-11-24 21:39:47,505 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 353 transitions. [2023-11-24 21:39:47,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 353 transitions. [2023-11-24 21:39:47,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:47,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 353 transitions. [2023-11-24 21:39:47,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 35.3) internal successors, (353), 10 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:47,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:47,509 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:47,509 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 273 flow. Second operand 10 states and 353 transitions. [2023-11-24 21:39:47,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 98 transitions, 485 flow [2023-11-24 21:39:47,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 98 transitions, 484 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:39:47,520 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 294 flow [2023-11-24 21:39:47,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=294, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2023-11-24 21:39:47,525 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 10 predicate places. [2023-11-24 21:39:47,526 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 294 flow [2023-11-24 21:39:47,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 29.272727272727273) internal successors, (322), 11 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:47,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:47,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:47,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:39:47,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:39:47,730 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:39:47,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:47,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2028997594, now seen corresponding path program 1 times [2023-11-24 21:39:47,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:47,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274550296] [2023-11-24 21:39:47,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:47,730 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 [2023-11-24 21:39:47,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:47,731 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:39:47,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-24 21:39:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:47,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:39:47,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:47,928 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-24 21:39:47,928 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 [2023-11-24 21:39:47,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:47,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:47,965 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 21:39:47,966 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 [2023-11-24 21:39:47,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:47,978 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 21:39:47,979 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 [2023-11-24 21:39:48,003 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:39:48,004 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 [2023-11-24 21:39:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:39:48,045 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:39:48,045 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:48,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274550296] [2023-11-24 21:39:48,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274550296] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:48,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:48,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:39:48,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666844804] [2023-11-24 21:39:48,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:48,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:39:48,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:48,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:39:48,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:39:48,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2023-11-24 21:39:48,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:48,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:48,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2023-11-24 21:39:48,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:48,410 INFO L124 PetriNetUnfolderBase]: 592/1180 cut-off events. [2023-11-24 21:39:48,410 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-24 21:39:48,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2192 conditions, 1180 events. 592/1180 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 7373 event pairs, 332 based on Foata normal form. 0/801 useless extension candidates. Maximal degree in co-relation 2178. Up to 904 conditions per place. [2023-11-24 21:39:48,421 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 53 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-11-24 21:39:48,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 398 flow [2023-11-24 21:39:48,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:39:48,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:39:48,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2023-11-24 21:39:48,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212121212121212 [2023-11-24 21:39:48,423 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 123 transitions. [2023-11-24 21:39:48,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 123 transitions. [2023-11-24 21:39:48,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:48,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 123 transitions. [2023-11-24 21:39:48,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:48,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:48,425 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:48,425 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 294 flow. Second operand 3 states and 123 transitions. [2023-11-24 21:39:48,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 398 flow [2023-11-24 21:39:48,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 371 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-24 21:39:48,429 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 265 flow [2023-11-24 21:39:48,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2023-11-24 21:39:48,430 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 5 predicate places. [2023-11-24 21:39:48,430 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 265 flow [2023-11-24 21:39:48,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:48,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:48,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:48,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:39:48,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:39:48,643 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:39:48,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:48,643 INFO L85 PathProgramCache]: Analyzing trace with hash 2028997595, now seen corresponding path program 1 times [2023-11-24 21:39:48,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:48,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915605666] [2023-11-24 21:39:48,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:48,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:39:48,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:48,652 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:39:48,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-24 21:39:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:48,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 21:39:48,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:48,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:48,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-24 21:39:48,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-24 21:39:48,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:48,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:48,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:39:48,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:48,901 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:39:48,956 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:39:48,959 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 [2023-11-24 21:39:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:49,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:39:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:49,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:49,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915605666] [2023-11-24 21:39:49,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915605666] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:39:49,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:39:49,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-11-24 21:39:49,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413704485] [2023-11-24 21:39:49,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:39:49,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:39:49,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:49,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:39:49,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:39:50,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2023-11-24 21:39:50,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 265 flow. Second operand has 11 states, 11 states have (on average 31.636363636363637) internal successors, (348), 11 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:50,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:50,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2023-11-24 21:39:50,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:52,142 INFO L124 PetriNetUnfolderBase]: 592/1162 cut-off events. [2023-11-24 21:39:52,142 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-24 21:39:52,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2157 conditions, 1162 events. 592/1162 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7159 event pairs, 332 based on Foata normal form. 0/786 useless extension candidates. Maximal degree in co-relation 2144. Up to 447 conditions per place. [2023-11-24 21:39:52,152 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 65 selfloop transitions, 13 changer transitions 0/93 dead transitions. [2023-11-24 21:39:52,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 93 transitions, 469 flow [2023-11-24 21:39:52,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:39:52,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:39:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 370 transitions. [2023-11-24 21:39:52,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2023-11-24 21:39:52,156 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 370 transitions. [2023-11-24 21:39:52,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 370 transitions. [2023-11-24 21:39:52,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:52,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 370 transitions. [2023-11-24 21:39:52,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:52,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:52,161 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:52,161 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 265 flow. Second operand 10 states and 370 transitions. [2023-11-24 21:39:52,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 93 transitions, 469 flow [2023-11-24 21:39:52,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 93 transitions, 468 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:39:52,165 INFO L231 Difference]: Finished difference. Result has 76 places, 69 transitions, 286 flow [2023-11-24 21:39:52,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=286, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2023-11-24 21:39:52,166 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 11 predicate places. [2023-11-24 21:39:52,166 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 286 flow [2023-11-24 21:39:52,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.636363636363637) internal successors, (348), 11 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:52,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:52,167 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-24 21:39:52,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-24 21:39:52,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:39:52,370 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:39:52,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:52,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1110995044, now seen corresponding path program 2 times [2023-11-24 21:39:52,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:52,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040348875] [2023-11-24 21:39:52,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:39:52,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:39:52,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:52,373 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:39:52,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_207320be-0732-4e19-b006-9dddb6f1f7e0/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-24 21:39:52,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:39:52,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:39:52,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 21:39:52,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:52,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-24 21:39:52,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:52,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:39:52,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:52,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:39:52,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:52,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:39:52,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:52,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:39:52,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:52,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:39:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:52,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:39:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:53,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:53,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040348875] [2023-11-24 21:39:53,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040348875] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:39:53,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:39:53,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-24 21:39:53,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442188199] [2023-11-24 21:39:53,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:39:53,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:39:53,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:53,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:39:53,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:39:56,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2023-11-24 21:39:56,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 69 transitions, 286 flow. Second operand has 14 states, 14 states have (on average 33.57142857142857) internal successors, (470), 14 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:56,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:56,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2023-11-24 21:39:56,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:40:02,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 21:40:05,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 21:40:09,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []