./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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_50fc2c85-6260-4731-bd91-d4c694f090c7/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 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:41:08,783 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:41:08,875 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:41:08,881 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:41:08,882 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:41:08,913 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:41:08,913 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:41:08,914 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:41:08,915 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:41:08,916 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:41:08,916 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:41:08,917 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:41:08,918 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:41:08,918 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:41:08,919 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:41:08,920 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:41:08,920 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:41:08,921 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:41:08,922 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:41:08,922 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:41:08,923 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:41:08,924 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:41:08,924 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:41:08,925 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:41:08,925 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:41:08,926 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:41:08,926 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:41:08,927 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:41:08,927 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:41:08,928 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:41:08,928 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:41:08,929 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:41:08,929 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:41:08,930 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:41:08,930 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:41:08,931 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:41:08,931 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:41:08,931 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:41:08,932 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:41:08,932 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:41:08,933 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:41:08,933 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_50fc2c85-6260-4731-bd91-d4c694f090c7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a [2023-11-24 21:41:09,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:41:09,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:41:09,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:41:09,225 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:41:09,226 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:41:09,228 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2023-11-24 21:41:12,437 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:41:12,749 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:41:12,750 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2023-11-24 21:41:12,760 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/data/0192e1b63/cbc294047b1a4745af9cee942df89ed7/FLAG7efec5cc7 [2023-11-24 21:41:12,785 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/data/0192e1b63/cbc294047b1a4745af9cee942df89ed7 [2023-11-24 21:41:12,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:41:12,798 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:41:12,802 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:41:12,803 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:41:12,809 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:41:12,809 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:41:12" (1/1) ... [2023-11-24 21:41:12,811 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@367d124f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:12, skipping insertion in model container [2023-11-24 21:41:12,811 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:41:12" (1/1) ... [2023-11-24 21:41:12,846 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:41:13,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:41:13,112 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 21:41:13,121 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@38415fb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:13, skipping insertion in model container [2023-11-24 21:41:13,121 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:41:13,122 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-24 21:41:13,125 INFO L158 Benchmark]: Toolchain (without parser) took 325.07ms. Allocated memory is still 190.8MB. Free memory was 151.4MB in the beginning and 140.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 21:41:13,125 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 138.4MB. Free memory is still 81.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:41:13,126 INFO L158 Benchmark]: CACSL2BoogieTranslator took 319.92ms. Allocated memory is still 190.8MB. Free memory was 150.9MB in the beginning and 140.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 21:41:13,128 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 138.4MB. Free memory is still 81.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 319.92ms. Allocated memory is still 190.8MB. Free memory was 150.9MB in the beginning and 140.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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_50fc2c85-6260-4731-bd91-d4c694f090c7/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 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:41:15,619 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:41:15,705 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-24 21:41:15,715 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:41:15,716 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:41:15,773 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:41:15,774 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:41:15,774 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:41:15,775 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:41:15,780 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:41:15,781 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:41:15,781 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:41:15,782 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:41:15,783 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:41:15,784 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:41:15,784 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:41:15,785 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:41:15,785 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:41:15,786 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:41:15,787 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:41:15,787 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:41:15,788 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:41:15,788 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:41:15,789 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:41:15,789 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:41:15,790 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 21:41:15,790 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 21:41:15,790 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:41:15,791 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:41:15,791 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:41:15,793 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:41:15,794 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:41:15,794 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:41:15,794 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:41:15,794 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:41:15,795 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:41:15,796 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:41:15,796 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-24 21:41:15,796 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 21:41:15,797 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:41:15,797 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:41:15,797 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:41:15,798 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:41:15,798 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-24 21:41:15,798 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_50fc2c85-6260-4731-bd91-d4c694f090c7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a [2023-11-24 21:41:16,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:41:16,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:41:16,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:41:16,242 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:41:16,243 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:41:16,244 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2023-11-24 21:41:19,373 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:41:19,669 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:41:19,669 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2023-11-24 21:41:19,678 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/data/71c344e79/9c9ca3dc34bc4fea8024e271d5c92824/FLAG94e5c1e19 [2023-11-24 21:41:19,692 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/data/71c344e79/9c9ca3dc34bc4fea8024e271d5c92824 [2023-11-24 21:41:19,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:41:19,700 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:41:19,702 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:41:19,702 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:41:19,706 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:41:19,707 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:41:19" (1/1) ... [2023-11-24 21:41:19,708 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@771989ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:19, skipping insertion in model container [2023-11-24 21:41:19,708 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:41:19" (1/1) ... [2023-11-24 21:41:19,734 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:41:19,970 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:41:19,989 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-24 21:41:20,008 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:41:20,047 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:41:20,066 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:41:20,130 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:41:20,150 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:41:20,150 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:41:20,159 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:41:20,160 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:20 WrapperNode [2023-11-24 21:41:20,160 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:41:20,161 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:41:20,162 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:41:20,162 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:41:20,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:20" (1/1) ... [2023-11-24 21:41:20,197 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:20" (1/1) ... [2023-11-24 21:41:20,239 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 104 [2023-11-24 21:41:20,239 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:41:20,240 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:41:20,240 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:41:20,240 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:41:20,253 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:20" (1/1) ... [2023-11-24 21:41:20,253 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:20" (1/1) ... [2023-11-24 21:41:20,278 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:20" (1/1) ... [2023-11-24 21:41:20,313 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 2, 2, 2, 7]. 47 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-24 21:41:20,317 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:20" (1/1) ... [2023-11-24 21:41:20,317 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:20" (1/1) ... [2023-11-24 21:41:20,337 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:20" (1/1) ... [2023-11-24 21:41:20,355 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:20" (1/1) ... [2023-11-24 21:41:20,358 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:20" (1/1) ... [2023-11-24 21:41:20,366 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:20" (1/1) ... [2023-11-24 21:41:20,371 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:41:20,375 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:41:20,380 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:41:20,381 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:41:20,382 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:20" (1/1) ... [2023-11-24 21:41:20,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:41:20,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:41:20,428 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:41:20,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:41:20,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:41:20,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-24 21:41:20,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-24 21:41:20,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-24 21:41:20,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-24 21:41:20,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-24 21:41:20,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:41:20,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-24 21:41:20,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-24 21:41:20,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-24 21:41:20,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-24 21:41:20,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-24 21:41:20,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:41:20,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:41:20,503 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:41:20,504 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:41:20,504 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-24 21:41:20,504 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-24 21:41:20,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:41:20,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:41:20,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:41:20,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:41:20,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:41:20,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:41:20,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-24 21:41:20,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-24 21:41:20,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-24 21:41:20,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-24 21:41:20,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-24 21:41:20,510 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 21:41:20,711 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:41:20,714 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:41:21,379 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:41:21,774 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:41:21,774 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 21:41:21,775 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:41:21 BoogieIcfgContainer [2023-11-24 21:41:21,775 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:41:21,779 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:41:21,779 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:41:21,783 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:41:21,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:41:19" (1/3) ... [2023-11-24 21:41:21,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c8224c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:41:21, skipping insertion in model container [2023-11-24 21:41:21,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:20" (2/3) ... [2023-11-24 21:41:21,786 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c8224c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:41:21, skipping insertion in model container [2023-11-24 21:41:21,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:41:21" (3/3) ... [2023-11-24 21:41:21,788 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2023-11-24 21:41:21,812 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:41:21,812 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-11-24 21:41:21,813 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:41:21,934 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-24 21:41:21,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 70 transitions, 161 flow [2023-11-24 21:41:22,022 INFO L124 PetriNetUnfolderBase]: 4/67 cut-off events. [2023-11-24 21:41:22,022 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-24 21:41:22,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 67 events. 4/67 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 162 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-11-24 21:41:22,027 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 70 transitions, 161 flow [2023-11-24 21:41:22,033 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 66 transitions, 150 flow [2023-11-24 21:41:22,045 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:41:22,052 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;@5caf307, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:41:22,053 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2023-11-24 21:41:22,058 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:41:22,058 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-24 21:41:22,058 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:41:22,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:22,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:41:22,060 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:41:22,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:22,066 INFO L85 PathProgramCache]: Analyzing trace with hash 504187, now seen corresponding path program 1 times [2023-11-24 21:41:22,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:41:22,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696470879] [2023-11-24 21:41:22,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:22,086 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 21:41:22,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:41:22,090 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:22,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:22,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:41:22,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:22,346 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 21:41:22,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,373 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 21:41:22,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:41:22,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:41:22,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-24 21:41:22,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,498 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 21:41:22,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,517 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 21:41:22,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,528 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 21:41:22,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,551 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 21:41:22,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,564 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 21:41:22,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,573 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 21:41:22,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,583 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 21:41:22,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,600 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 21:41:22,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,608 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 21:41:22,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,625 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 21:41:22,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,646 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 21:41:22,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,656 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 21:41:22,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,667 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 21:41:22,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,683 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 21:41:22,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:41:22,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,701 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 21:41:22,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,711 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 21:41:22,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,726 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 21:41:22,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:22,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:41:22,757 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 21:41:22,757 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:41:22,758 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:41:22,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696470879] [2023-11-24 21:41:22,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696470879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:22,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:22,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:41:22,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777102248] [2023-11-24 21:41:22,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:22,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:22,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:41:22,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:22,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:22,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 70 [2023-11-24 21:41:22,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 66 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 21:41:22,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:22,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 70 [2023-11-24 21:41:22,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:23,595 INFO L124 PetriNetUnfolderBase]: 1316/2201 cut-off events. [2023-11-24 21:41:23,598 INFO L125 PetriNetUnfolderBase]: For 172/174 co-relation queries the response was YES. [2023-11-24 21:41:23,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4214 conditions, 2201 events. 1316/2201 cut-off events. For 172/174 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 13231 event pairs, 1060 based on Foata normal form. 1/1520 useless extension candidates. Maximal degree in co-relation 4087. Up to 1877 conditions per place. [2023-11-24 21:41:23,632 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 30 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-11-24 21:41:23,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 196 flow [2023-11-24 21:41:23,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:23,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:41:23,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2023-11-24 21:41:23,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2023-11-24 21:41:23,649 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 127 transitions. [2023-11-24 21:41:23,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 127 transitions. [2023-11-24 21:41:23,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:23,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 127 transitions. [2023-11-24 21:41:23,665 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 21:41:23,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 21:41:23,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 21:41:23,675 INFO L175 Difference]: Start difference. First operand has 72 places, 66 transitions, 150 flow. Second operand 3 states and 127 transitions. [2023-11-24 21:41:23,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 196 flow [2023-11-24 21:41:23,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 57 transitions, 184 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-24 21:41:23,693 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 124 flow [2023-11-24 21:41:23,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2023-11-24 21:41:23,700 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -13 predicate places. [2023-11-24 21:41:23,700 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 124 flow [2023-11-24 21:41:23,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 21:41:23,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:23,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:41:23,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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)] Ended with exit code 0 [2023-11-24 21:41:23,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:23,904 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:41:23,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:23,905 INFO L85 PathProgramCache]: Analyzing trace with hash 504188, now seen corresponding path program 1 times [2023-11-24 21:41:23,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:41:23,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989757267] [2023-11-24 21:41:23,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:23,906 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 21:41:23,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:41:23,907 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:23,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:23,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:41:23,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:24,058 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 21:41:24,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-24 21:41:24,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,148 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 21:41:24,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:41:24,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:41:24,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,206 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 21:41:24,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,223 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 21:41:24,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,236 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 21:41:24,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,254 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 21:41:24,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,281 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 21:41:24,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:41:24,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,306 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 21:41:24,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,320 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 21:41:24,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,337 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 21:41:24,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,352 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 21:41:24,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,361 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 21:41:24,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,389 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 21:41:24,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,403 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 21:41:24,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,421 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 21:41:24,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:41:24,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,443 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 21:41:24,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,457 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 21:41:24,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,472 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 21:41:24,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:24,495 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 21:41:24,574 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 21:41:24,574 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:41:24,575 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:41:24,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989757267] [2023-11-24 21:41:24,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989757267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:24,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:24,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:41:24,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078658999] [2023-11-24 21:41:24,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:24,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:41:24,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:41:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:41:24,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:41:24,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 70 [2023-11-24 21:41:24,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:24,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:24,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 70 [2023-11-24 21:41:24,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:25,460 INFO L124 PetriNetUnfolderBase]: 1317/2204 cut-off events. [2023-11-24 21:41:25,460 INFO L125 PetriNetUnfolderBase]: For 43/45 co-relation queries the response was YES. [2023-11-24 21:41:25,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4136 conditions, 2204 events. 1317/2204 cut-off events. For 43/45 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 13267 event pairs, 1060 based on Foata normal form. 0/1522 useless extension candidates. Maximal degree in co-relation 4114. Up to 1882 conditions per place. [2023-11-24 21:41:25,484 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 32 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-11-24 21:41:25,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 60 transitions, 204 flow [2023-11-24 21:41:25,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:41:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:41:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2023-11-24 21:41:25,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5464285714285714 [2023-11-24 21:41:25,488 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 153 transitions. [2023-11-24 21:41:25,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 153 transitions. [2023-11-24 21:41:25,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:25,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 153 transitions. [2023-11-24 21:41:25,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 21:41:25,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:25,492 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:25,492 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 124 flow. Second operand 4 states and 153 transitions. [2023-11-24 21:41:25,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 60 transitions, 204 flow [2023-11-24 21:41:25,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 60 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:41:25,495 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 147 flow [2023-11-24 21:41:25,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2023-11-24 21:41:25,497 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -10 predicate places. [2023-11-24 21:41:25,497 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 147 flow [2023-11-24 21:41:25,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:25,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:25,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:41:25,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:25,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:25,706 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:41:25,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:25,706 INFO L85 PathProgramCache]: Analyzing trace with hash 504236, now seen corresponding path program 1 times [2023-11-24 21:41:25,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:41:25,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456983051] [2023-11-24 21:41:25,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:25,707 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 21:41:25,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:41:25,709 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:25,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:25,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:41:25,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:25,852 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 21:41:25,853 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:41:25,853 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:41:25,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456983051] [2023-11-24 21:41:25,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456983051] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:25,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:25,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:41:25,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209118143] [2023-11-24 21:41:25,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:25,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:25,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:41:25,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:25,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:25,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 70 [2023-11-24 21:41:25,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 21:41:25,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:25,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 70 [2023-11-24 21:41:25,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:26,350 INFO L124 PetriNetUnfolderBase]: 1316/2203 cut-off events. [2023-11-24 21:41:26,350 INFO L125 PetriNetUnfolderBase]: For 43/45 co-relation queries the response was YES. [2023-11-24 21:41:26,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4141 conditions, 2203 events. 1316/2203 cut-off events. For 43/45 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 13237 event pairs, 1060 based on Foata normal form. 1/1522 useless extension candidates. Maximal degree in co-relation 4125. Up to 1880 conditions per place. [2023-11-24 21:41:26,373 INFO L140 encePairwiseOnDemand]: 67/70 looper letters, 32 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-11-24 21:41:26,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 59 transitions, 210 flow [2023-11-24 21:41:26,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:41:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-24 21:41:26,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2023-11-24 21:41:26,375 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-24 21:41:26,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-24 21:41:26,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:26,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-24 21:41:26,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 21:41:26,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 21:41:26,378 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 21:41:26,378 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 147 flow. Second operand 3 states and 125 transitions. [2023-11-24 21:41:26,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 59 transitions, 210 flow [2023-11-24 21:41:26,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 59 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:41:26,381 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 144 flow [2023-11-24 21:41:26,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=61, 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=144, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2023-11-24 21:41:26,382 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2023-11-24 21:41:26,382 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 144 flow [2023-11-24 21:41:26,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 21:41:26,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:26,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:41:26,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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)] Ended with exit code 0 [2023-11-24 21:41:26,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:26,587 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:41:26,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:26,587 INFO L85 PathProgramCache]: Analyzing trace with hash 484540716, now seen corresponding path program 1 times [2023-11-24 21:41:26,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:41:26,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558805536] [2023-11-24 21:41:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:26,588 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 21:41:26,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:41:26,590 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:26,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:26,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-24 21:41:26,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:26,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:26,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:26,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:26,756 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 14 treesize of output 18 [2023-11-24 21:41:26,783 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-24 21:41:26,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-11-24 21:41:26,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:26,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:26,905 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-11-24 21:41:26,905 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 2 case distinctions, treesize of input 19 treesize of output 26 [2023-11-24 21:41:26,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:26,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-24 21:41:28,201 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 21:41:28,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:41:28,657 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 21:41:28,657 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:41:28,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558805536] [2023-11-24 21:41:28,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558805536] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:41:28,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:41:28,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:41:28,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55666729] [2023-11-24 21:41:28,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:41:28,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:41:28,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:41:28,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:41:28,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:41:30,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 70 [2023-11-24 21:41:30,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 144 flow. Second operand has 10 states, 10 states have (on average 27.0) internal successors, (270), 10 states have internal predecessors, (270), 0 states have call successors, (0), 0 states 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 21:41:30,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:30,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 70 [2023-11-24 21:41:30,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:32,773 INFO L124 PetriNetUnfolderBase]: 1965/3131 cut-off events. [2023-11-24 21:41:32,773 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-24 21:41:32,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5942 conditions, 3131 events. 1965/3131 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 18251 event pairs, 1600 based on Foata normal form. 0/2208 useless extension candidates. Maximal degree in co-relation 5925. Up to 2745 conditions per place. [2023-11-24 21:41:32,802 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 34 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-11-24 21:41:32,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 230 flow [2023-11-24 21:41:32,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:41:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:41:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 197 transitions. [2023-11-24 21:41:32,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2023-11-24 21:41:32,805 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 197 transitions. [2023-11-24 21:41:32,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 197 transitions. [2023-11-24 21:41:32,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:32,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 197 transitions. [2023-11-24 21:41:32,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 32.833333333333336) internal successors, (197), 6 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:32,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 21:41:32,810 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 21:41:32,810 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 144 flow. Second operand 6 states and 197 transitions. [2023-11-24 21:41:32,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 230 flow [2023-11-24 21:41:32,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 60 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:41:32,815 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 161 flow [2023-11-24 21:41:32,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=161, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2023-11-24 21:41:32,818 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -7 predicate places. [2023-11-24 21:41:32,818 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 161 flow [2023-11-24 21:41:32,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.0) internal successors, (270), 10 states have internal predecessors, (270), 0 states have call successors, (0), 0 states 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 21:41:32,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:32,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:41:32,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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)] Ended with exit code 0 [2023-11-24 21:41:33,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:33,021 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:41:33,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:33,022 INFO L85 PathProgramCache]: Analyzing trace with hash 484540715, now seen corresponding path program 1 times [2023-11-24 21:41:33,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:41:33,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778834173] [2023-11-24 21:41:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:33,023 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 21:41:33,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:41:33,025 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:33,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:33,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:41:33,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:33,198 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:41:33,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-24 21:41:33,242 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-24 21:41:33,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-24 21:41:33,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:33,285 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-24 21:41:33,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2023-11-24 21:41:33,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:33,342 INFO L349 Elim1Store]: treesize reduction 60, result has 10.4 percent of original size [2023-11-24 21:41:33,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2023-11-24 21:41:33,376 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:41:33,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-24 21:41:33,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:33,418 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-24 21:41:33,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2023-11-24 21:41:33,645 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 21:41:33,645 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:41:33,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:41:33,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778834173] [2023-11-24 21:41:33,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778834173] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:33,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:33,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:41:33,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673147908] [2023-11-24 21:41:33,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:33,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:33,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:41:33,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:33,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:33,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 70 [2023-11-24 21:41:33,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 21:41:33,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:33,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 70 [2023-11-24 21:41:33,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:34,256 INFO L124 PetriNetUnfolderBase]: 1965/3094 cut-off events. [2023-11-24 21:41:34,257 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-24 21:41:34,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5913 conditions, 3094 events. 1965/3094 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 17663 event pairs, 1600 based on Foata normal form. 0/2173 useless extension candidates. Maximal degree in co-relation 5874. Up to 2749 conditions per place. [2023-11-24 21:41:34,288 INFO L140 encePairwiseOnDemand]: 67/70 looper letters, 37 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-11-24 21:41:34,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 233 flow [2023-11-24 21:41:34,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:34,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:41:34,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2023-11-24 21:41:34,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2023-11-24 21:41:34,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 114 transitions. [2023-11-24 21:41:34,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 114 transitions. [2023-11-24 21:41:34,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:34,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 114 transitions. [2023-11-24 21:41:34,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 21:41:34,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 21:41:34,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 21:41:34,296 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 161 flow. Second operand 3 states and 114 transitions. [2023-11-24 21:41:34,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 233 flow [2023-11-24 21:41:34,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 228 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:41:34,300 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 154 flow [2023-11-24 21:41:34,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-11-24 21:41:34,302 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -10 predicate places. [2023-11-24 21:41:34,303 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 154 flow [2023-11-24 21:41:34,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 21:41:34,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:34,305 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-24 21:41:34,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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)] Ended with exit code 0 [2023-11-24 21:41:34,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:34,508 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:41:34,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:34,510 INFO L85 PathProgramCache]: Analyzing trace with hash 484540668, now seen corresponding path program 1 times [2023-11-24 21:41:34,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:41:34,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082160278] [2023-11-24 21:41:34,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:34,511 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 21:41:34,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:41:34,512 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:34,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:34,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:41:34,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:34,616 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 21:41:34,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:41:34,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,651 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 21:41:34,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,665 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 21:41:34,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,679 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 21:41:34,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,688 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 21:41:34,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,704 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 21:41:34,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,724 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 21:41:34,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,737 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 21:41:34,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,755 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 21:41:34,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-24 21:41:34,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,816 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 21:41:34,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:41:34,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,837 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 21:41:34,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,849 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 21:41:34,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:41:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,872 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 21:41:34,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,892 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 21:41:34,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,906 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 21:41:34,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,914 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 21:41:34,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:41:34,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:41:34,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,963 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 21:41:34,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:34,971 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 21:41:35,123 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 21:41:35,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:41:35,563 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 21:41:35,563 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:41:35,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082160278] [2023-11-24 21:41:35,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082160278] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:41:35,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:41:35,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:41:35,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121861601] [2023-11-24 21:41:35,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:41:35,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:41:35,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:41:35,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:41:35,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:41:36,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 70 [2023-11-24 21:41:36,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 154 flow. Second operand has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states 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 21:41:36,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:36,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 70 [2023-11-24 21:41:36,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:37,907 INFO L124 PetriNetUnfolderBase]: 1319/2138 cut-off events. [2023-11-24 21:41:37,907 INFO L125 PetriNetUnfolderBase]: For 47/49 co-relation queries the response was YES. [2023-11-24 21:41:37,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4107 conditions, 2138 events. 1319/2138 cut-off events. For 47/49 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 12130 event pairs, 1060 based on Foata normal form. 3/1534 useless extension candidates. Maximal degree in co-relation 4097. Up to 1884 conditions per place. [2023-11-24 21:41:37,928 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 32 selfloop transitions, 12 changer transitions 0/64 dead transitions. [2023-11-24 21:41:37,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 64 transitions, 278 flow [2023-11-24 21:41:37,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:41:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:41:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 337 transitions. [2023-11-24 21:41:37,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48142857142857143 [2023-11-24 21:41:37,932 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 337 transitions. [2023-11-24 21:41:37,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 337 transitions. [2023-11-24 21:41:37,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:37,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 337 transitions. [2023-11-24 21:41:37,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 33.7) internal successors, (337), 10 states have internal predecessors, (337), 0 states have call successors, (0), 0 states 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 21:41:37,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 21:41:37,937 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 21:41:37,937 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 154 flow. Second operand 10 states and 337 transitions. [2023-11-24 21:41:37,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 64 transitions, 278 flow [2023-11-24 21:41:37,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 64 transitions, 275 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-24 21:41:37,942 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 229 flow [2023-11-24 21:41:37,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=229, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2023-11-24 21:41:37,945 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2023-11-24 21:41:37,946 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 229 flow [2023-11-24 21:41:37,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states 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 21:41:37,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:37,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:37,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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)] Ended with exit code 0 [2023-11-24 21:41:38,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:38,150 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:41:38,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:38,151 INFO L85 PathProgramCache]: Analyzing trace with hash -432129652, now seen corresponding path program 1 times [2023-11-24 21:41:38,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:41:38,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545479182] [2023-11-24 21:41:38,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:38,152 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 21:41:38,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:41:38,153 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:38,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:38,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:41:38,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:38,318 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-24 21:41:38,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2023-11-24 21:41:38,342 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:41:38,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2023-11-24 21:41:38,369 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:41:38,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-24 21:41:38,408 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-24 21:41:38,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-24 21:41:38,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:38,445 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:41:38,445 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 24 treesize of output 22 [2023-11-24 21:41:38,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:38,504 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-24 21:41:38,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-24 21:41:38,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:38,545 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-24 21:41:38,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-24 21:41:38,568 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:41:38,569 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 17 treesize of output 22 [2023-11-24 21:41:39,053 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 21:41:39,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:41:39,054 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:41:39,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545479182] [2023-11-24 21:41:39,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545479182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:39,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:39,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:41:39,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928837276] [2023-11-24 21:41:39,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:39,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:39,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:41:39,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:39,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:39,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 70 [2023-11-24 21:41:39,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 21:41:39,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:39,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 70 [2023-11-24 21:41:39,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:39,623 INFO L124 PetriNetUnfolderBase]: 1397/2268 cut-off events. [2023-11-24 21:41:39,624 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-11-24 21:41:39,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4379 conditions, 2268 events. 1397/2268 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 12781 event pairs, 1125 based on Foata normal form. 0/1635 useless extension candidates. Maximal degree in co-relation 4365. Up to 2010 conditions per place. [2023-11-24 21:41:39,640 INFO L140 encePairwiseOnDemand]: 67/70 looper letters, 44 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-11-24 21:41:39,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 62 transitions, 315 flow [2023-11-24 21:41:39,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:41:39,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2023-11-24 21:41:39,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2023-11-24 21:41:39,642 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 114 transitions. [2023-11-24 21:41:39,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 114 transitions. [2023-11-24 21:41:39,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:39,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 114 transitions. [2023-11-24 21:41:39,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 21:41:39,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 21:41:39,645 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 21:41:39,645 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 229 flow. Second operand 3 states and 114 transitions. [2023-11-24 21:41:39,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 62 transitions, 315 flow [2023-11-24 21:41:39,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 62 transitions, 271 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-11-24 21:41:39,648 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 183 flow [2023-11-24 21:41:39,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2023-11-24 21:41:39,649 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -4 predicate places. [2023-11-24 21:41:39,650 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 183 flow [2023-11-24 21:41:39,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 21:41:39,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:39,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:39,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:39,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:39,853 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:41:39,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:39,853 INFO L85 PathProgramCache]: Analyzing trace with hash -432129651, now seen corresponding path program 1 times [2023-11-24 21:41:39,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:41:39,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102056751] [2023-11-24 21:41:39,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:39,854 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 21:41:39,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:41:39,856 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:39,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:39,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:41:39,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:40,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:40,005 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 13 [2023-11-24 21:41:40,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:40,017 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 21:41:40,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:40,079 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:41:40,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2023-11-24 21:41:40,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:40,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-24 21:41:40,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:40,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:40,135 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 13 [2023-11-24 21:41:40,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:40,144 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 21:41:40,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:40,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:40,199 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:41:40,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-24 21:41:40,210 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 21:41:40,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:40,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:40,275 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:41:40,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-24 21:41:40,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:40,288 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 21:41:40,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:40,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:40,321 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 13 [2023-11-24 21:41:40,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:40,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:40,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:40,389 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:41:40,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-24 21:41:40,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:40,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:40,424 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 13 [2023-11-24 21:41:40,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:41,179 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 21:41:41,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:41:41,558 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 21:41:41,559 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:41:41,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102056751] [2023-11-24 21:41:41,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102056751] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:41:41,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:41:41,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:41:41,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932152116] [2023-11-24 21:41:41,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:41:41,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:41:41,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:41:41,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:41:41,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:41:42,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 70 [2023-11-24 21:41:42,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 183 flow. Second operand has 10 states, 10 states have (on average 27.4) internal successors, (274), 10 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 21:41:42,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:42,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 70 [2023-11-24 21:41:42,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:44,513 INFO L124 PetriNetUnfolderBase]: 1397/2261 cut-off events. [2023-11-24 21:41:44,513 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-24 21:41:44,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4350 conditions, 2261 events. 1397/2261 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 12669 event pairs, 1125 based on Foata normal form. 0/1627 useless extension candidates. Maximal degree in co-relation 4337. Up to 2006 conditions per place. [2023-11-24 21:41:44,530 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 40 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-11-24 21:41:44,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 60 transitions, 269 flow [2023-11-24 21:41:44,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:41:44,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:41:44,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 197 transitions. [2023-11-24 21:41:44,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2023-11-24 21:41:44,533 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 197 transitions. [2023-11-24 21:41:44,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 197 transitions. [2023-11-24 21:41:44,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:44,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 197 transitions. [2023-11-24 21:41:44,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 32.833333333333336) internal successors, (197), 6 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:44,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 21:41:44,536 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 21:41:44,536 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 183 flow. Second operand 6 states and 197 transitions. [2023-11-24 21:41:44,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 60 transitions, 269 flow [2023-11-24 21:41:44,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 60 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:41:44,540 INFO L231 Difference]: Finished difference. Result has 70 places, 60 transitions, 188 flow [2023-11-24 21:41:44,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=188, PETRI_PLACES=70, PETRI_TRANSITIONS=60} [2023-11-24 21:41:44,543 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -2 predicate places. [2023-11-24 21:41:44,543 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 60 transitions, 188 flow [2023-11-24 21:41:44,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.4) internal successors, (274), 10 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 21:41:44,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:44,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:44,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:44,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:44,747 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:41:44,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:44,748 INFO L85 PathProgramCache]: Analyzing trace with hash -511061778, now seen corresponding path program 1 times [2023-11-24 21:41:44,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:41:44,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140295063] [2023-11-24 21:41:44,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:44,748 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 21:41:44,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:41:44,750 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:44,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:44,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:41:44,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:44,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:41:44,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:44,867 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 21:41:44,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:44,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:41:44,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:44,881 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 21:41:44,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:44,896 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 21:41:44,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:44,903 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 21:41:44,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:44,914 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 21:41:44,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:44,929 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 21:41:44,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:44,946 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 21:41:44,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:44,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:41:44,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:44,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-24 21:41:45,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:45,016 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 21:41:45,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:45,030 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 21:41:45,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:45,035 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 21:41:45,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:45,041 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 21:41:45,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:45,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:41:45,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:45,057 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 21:41:45,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:45,071 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 21:41:45,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:45,088 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 21:41:45,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:45,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:41:45,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:45,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:41:45,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:45,107 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 21:41:45,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:45,112 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 21:41:45,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:45,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:41:45,155 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 21:41:45,155 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:41:45,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:41:45,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140295063] [2023-11-24 21:41:45,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140295063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:45,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:45,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:41:45,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662628603] [2023-11-24 21:41:45,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:45,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:41:45,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:41:45,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:41:45,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:41:45,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 70 [2023-11-24 21:41:45,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 60 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 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 21:41:45,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:45,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 70 [2023-11-24 21:41:45,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:45,563 INFO L124 PetriNetUnfolderBase]: 795/1315 cut-off events. [2023-11-24 21:41:45,563 INFO L125 PetriNetUnfolderBase]: For 37/39 co-relation queries the response was YES. [2023-11-24 21:41:45,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2535 conditions, 1315 events. 795/1315 cut-off events. For 37/39 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6711 event pairs, 608 based on Foata normal form. 0/1071 useless extension candidates. Maximal degree in co-relation 2521. Up to 1137 conditions per place. [2023-11-24 21:41:45,573 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 35 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2023-11-24 21:41:45,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 57 transitions, 262 flow [2023-11-24 21:41:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:41:45,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:41:45,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 148 transitions. [2023-11-24 21:41:45,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2023-11-24 21:41:45,575 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 148 transitions. [2023-11-24 21:41:45,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 148 transitions. [2023-11-24 21:41:45,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:45,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 148 transitions. [2023-11-24 21:41:45,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 21:41:45,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:45,577 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:45,578 INFO L175 Difference]: Start difference. First operand has 70 places, 60 transitions, 188 flow. Second operand 4 states and 148 transitions. [2023-11-24 21:41:45,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 57 transitions, 262 flow [2023-11-24 21:41:45,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 57 transitions, 254 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:41:45,580 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 184 flow [2023-11-24 21:41:45,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2023-11-24 21:41:45,581 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -6 predicate places. [2023-11-24 21:41:45,581 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 184 flow [2023-11-24 21:41:45,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 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 21:41:45,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:45,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:45,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:45,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:45,790 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:41:45,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:45,790 INFO L85 PathProgramCache]: Analyzing trace with hash -511061777, now seen corresponding path program 1 times [2023-11-24 21:41:45,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:41:45,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954869275] [2023-11-24 21:41:45,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:45,791 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 21:41:45,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:41:45,792 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:45,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:45,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:41:45,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:45,981 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 21:41:45,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:41:46,241 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 25 treesize of output 21 [2023-11-24 21:41:46,333 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 21:41:46,333 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:41:46,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954869275] [2023-11-24 21:41:46,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954869275] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:41:46,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:41:46,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:41:46,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342759659] [2023-11-24 21:41:46,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:41:46,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:41:46,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:41:46,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:41:46,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:41:48,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 70 [2023-11-24 21:41:48,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 184 flow. Second operand has 10 states, 10 states have (on average 31.4) internal successors, (314), 10 states have internal predecessors, (314), 0 states have call successors, (0), 0 states 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 21:41:48,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:48,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 70 [2023-11-24 21:41:48,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:49,324 INFO L124 PetriNetUnfolderBase]: 1151/1829 cut-off events. [2023-11-24 21:41:49,324 INFO L125 PetriNetUnfolderBase]: For 37/39 co-relation queries the response was YES. [2023-11-24 21:41:49,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3543 conditions, 1829 events. 1151/1829 cut-off events. For 37/39 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9528 event pairs, 483 based on Foata normal form. 0/1553 useless extension candidates. Maximal degree in co-relation 3529. Up to 990 conditions per place. [2023-11-24 21:41:49,338 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 61 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2023-11-24 21:41:49,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 90 transitions, 400 flow [2023-11-24 21:41:49,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:41:49,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-24 21:41:49,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 308 transitions. [2023-11-24 21:41:49,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-11-24 21:41:49,341 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 308 transitions. [2023-11-24 21:41:49,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 308 transitions. [2023-11-24 21:41:49,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:49,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 308 transitions. [2023-11-24 21:41:49,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 38.5) internal successors, (308), 8 states have internal predecessors, (308), 0 states have call successors, (0), 0 states 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 21:41:49,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 21:41:49,346 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 21:41:49,347 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 184 flow. Second operand 8 states and 308 transitions. [2023-11-24 21:41:49,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 90 transitions, 400 flow [2023-11-24 21:41:49,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 90 transitions, 394 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:41:49,350 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 226 flow [2023-11-24 21:41:49,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=226, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2023-11-24 21:41:49,352 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2023-11-24 21:41:49,353 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 226 flow [2023-11-24 21:41:49,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.4) internal successors, (314), 10 states have internal predecessors, (314), 0 states have call successors, (0), 0 states 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 21:41:49,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:49,353 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-24 21:41:49,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:49,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:49,556 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:41:49,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:49,557 INFO L85 PathProgramCache]: Analyzing trace with hash -770986116, now seen corresponding path program 2 times [2023-11-24 21:41:49,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:41:49,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671715812] [2023-11-24 21:41:49,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:41:49,557 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 21:41:49,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:41:49,559 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:49,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:49,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:41:49,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:41:49,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 21:41:49,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:49,709 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 21:41:49,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:49,731 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 21:41:49,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:49,752 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 21:41:49,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:49,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:41:49,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:49,785 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 21:41:49,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:49,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-24 21:41:49,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:49,828 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 21:41:49,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:49,835 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 21:41:49,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:49,847 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 21:41:49,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:49,854 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 21:41:49,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:49,867 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 21:41:49,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:49,888 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 21:41:49,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:49,901 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 21:41:49,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:49,908 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 21:41:49,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:49,917 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 21:41:49,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:49,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:41:49,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:49,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:41:49,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:49,960 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 21:41:49,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:49,973 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 21:41:49,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:49,992 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 21:41:50,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:50,003 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 21:41:50,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:50,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:41:50,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:50,018 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 21:41:50,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:50,027 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 21:41:50,310 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 21:41:50,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:41:51,118 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 21:41:51,118 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:41:51,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671715812] [2023-11-24 21:41:51,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671715812] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:41:51,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:41:51,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-24 21:41:51,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328838828] [2023-11-24 21:41:51,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:41:51,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:41:51,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:41:51,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:41:51,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:41:54,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 70 [2023-11-24 21:41:54,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 226 flow. Second operand has 14 states, 14 states have (on average 30.571428571428573) internal successors, (428), 14 states have internal predecessors, (428), 0 states have call successors, (0), 0 states 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 21:41:54,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:54,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 70 [2023-11-24 21:41:54,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:58,264 INFO L124 PetriNetUnfolderBase]: 1157/1844 cut-off events. [2023-11-24 21:41:58,264 INFO L125 PetriNetUnfolderBase]: For 997/999 co-relation queries the response was YES. [2023-11-24 21:41:58,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4365 conditions, 1844 events. 1157/1844 cut-off events. For 997/999 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 9556 event pairs, 858 based on Foata normal form. 6/1630 useless extension candidates. Maximal degree in co-relation 4349. Up to 1628 conditions per place. [2023-11-24 21:41:58,285 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 32 selfloop transitions, 30 changer transitions 0/78 dead transitions. [2023-11-24 21:41:58,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 78 transitions, 458 flow [2023-11-24 21:41:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-24 21:41:58,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-24 21:41:58,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 703 transitions. [2023-11-24 21:41:58,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564935064935065 [2023-11-24 21:41:58,297 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 703 transitions. [2023-11-24 21:41:58,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 703 transitions. [2023-11-24 21:41:58,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:58,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 703 transitions. [2023-11-24 21:41:58,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 31.954545454545453) internal successors, (703), 22 states have internal predecessors, (703), 0 states have call successors, (0), 0 states 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 21:41:58,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 70.0) internal successors, (1610), 23 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states 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 21:41:58,313 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 70.0) internal successors, (1610), 23 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states 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 21:41:58,314 INFO L175 Difference]: Start difference. First operand has 73 places, 60 transitions, 226 flow. Second operand 22 states and 703 transitions. [2023-11-24 21:41:58,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 78 transitions, 458 flow [2023-11-24 21:41:58,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 78 transitions, 452 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:41:58,320 INFO L231 Difference]: Finished difference. Result has 97 places, 78 transitions, 418 flow [2023-11-24 21:41:58,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=418, PETRI_PLACES=97, PETRI_TRANSITIONS=78} [2023-11-24 21:41:58,321 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 25 predicate places. [2023-11-24 21:41:58,322 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 78 transitions, 418 flow [2023-11-24 21:41:58,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 30.571428571428573) internal successors, (428), 14 states have internal predecessors, (428), 0 states have call successors, (0), 0 states 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 21:41:58,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:58,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:58,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-24 21:41:58,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:58,525 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:41:58,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:58,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1556965591, now seen corresponding path program 1 times [2023-11-24 21:41:58,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:41:58,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22478482] [2023-11-24 21:41:58,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:58,526 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 21:41:58,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:41:58,527 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:58,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-24 21:41:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:58,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:41:58,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:58,668 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:41:58,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-24 21:41:58,690 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:41:58,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-24 21:41:58,717 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:41:58,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-24 21:41:58,745 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:41:58,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-24 21:41:58,780 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:41:58,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-24 21:41:58,806 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:41:58,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-24 21:41:58,842 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:41:58,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-24 21:41:58,884 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:41:58,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-24 21:41:58,917 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:41:58,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-24 21:41:58,942 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:41:58,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-24 21:41:58,972 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:41:58,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-24 21:41:58,995 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:41:58,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-24 21:41:59,268 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 21:41:59,269 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:41:59,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:41:59,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22478482] [2023-11-24 21:41:59,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22478482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:59,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:59,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:41:59,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320606004] [2023-11-24 21:41:59,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:59,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:59,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:41:59,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:59,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:59,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 70 [2023-11-24 21:41:59,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 78 transitions, 418 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 21:41:59,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:59,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 70 [2023-11-24 21:41:59,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:59,727 INFO L124 PetriNetUnfolderBase]: 1237/1927 cut-off events. [2023-11-24 21:41:59,727 INFO L125 PetriNetUnfolderBase]: For 1095/1095 co-relation queries the response was YES. [2023-11-24 21:41:59,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4676 conditions, 1927 events. 1237/1927 cut-off events. For 1095/1095 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9744 event pairs, 920 based on Foata normal form. 0/1740 useless extension candidates. Maximal degree in co-relation 4654. Up to 1766 conditions per place. [2023-11-24 21:41:59,743 INFO L140 encePairwiseOnDemand]: 67/70 looper letters, 62 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-11-24 21:41:59,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 76 transitions, 540 flow [2023-11-24 21:41:59,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:59,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:41:59,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2023-11-24 21:41:59,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2023-11-24 21:41:59,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2023-11-24 21:41:59,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2023-11-24 21:41:59,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:59,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2023-11-24 21:41:59,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:59,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 21:41:59,747 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 21:41:59,747 INFO L175 Difference]: Start difference. First operand has 97 places, 78 transitions, 418 flow. Second operand 3 states and 111 transitions. [2023-11-24 21:41:59,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 76 transitions, 540 flow [2023-11-24 21:41:59,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 76 transitions, 462 flow, removed 27 selfloop flow, removed 9 redundant places. [2023-11-24 21:41:59,752 INFO L231 Difference]: Finished difference. Result has 88 places, 76 transitions, 338 flow [2023-11-24 21:41:59,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=338, PETRI_PLACES=88, PETRI_TRANSITIONS=76} [2023-11-24 21:41:59,753 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 16 predicate places. [2023-11-24 21:41:59,753 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 76 transitions, 338 flow [2023-11-24 21:41:59,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 21:41:59,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:59,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:59,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-24 21:41:59,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:59,957 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:41:59,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:59,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1556965590, now seen corresponding path program 1 times [2023-11-24 21:41:59,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:41:59,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542113053] [2023-11-24 21:41:59,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:59,958 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 21:41:59,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:41:59,959 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/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 21:41:59,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50fc2c85-6260-4731-bd91-d4c694f090c7/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-24 21:42:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:00,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:42:00,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:42:00,128 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:42:00,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2023-11-24 21:42:00,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:00,190 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:42:00,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-24 21:42:00,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:00,234 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:42:00,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-24 21:42:00,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:00,265 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:42:00,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-24 21:42:00,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:00,299 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:42:00,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-24 21:42:00,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:00,351 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:42:00,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-24 21:42:00,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:00,385 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:42:00,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-24 21:42:00,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:00,435 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:42:00,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-24 21:42:00,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:00,464 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:42:00,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-24 21:42:00,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:00,497 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:42:00,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-24 21:42:00,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:00,538 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:42:00,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-24 21:42:00,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:00,566 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:42:00,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-24 21:42:01,452 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 21:42:01,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:42:01,828 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 21:42:01,828 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:42:01,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542113053] [2023-11-24 21:42:01,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542113053] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:42:01,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:42:01,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:42:01,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662696080] [2023-11-24 21:42:01,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:42:01,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:42:01,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:42:01,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:42:01,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90